特点■ 临界模式工作,无需电感补偿■ 内置500V功率MOSFET■ 源极驱动,无需辅助绕组供电■ 高达±3%的LED电流精度■ 高达93%以上的系统效率■ LED开路/短路保护■ CS采样电阻短路保护■ 智能温度控制技术,避免高温灯闪■ 芯片过温保护■ 外部可调输出开路/过压保护
WS3441 是一款高精度的LED 恒流控制芯片,应用于非隔离的降压型LED 电源系统,适合全范围的交流电压输入或者12V~500V 的直流电压输入。WS3441 内部集成500V 功率MOSFET,只需要很少的外围元件,即可实现优异的恒流特性。WS3441 芯片内带有高精度的电流取样电路,同时采用了先进的恒流控制技术,实现高精度的LED 恒流输出和优异的线性调整率。芯片工作在电感电流临界模式,系统输出电流不随电感量和LED 工作电压的变化而变化,实现优异的负载调整率。WS3441 采用先进的源极驱动技术,芯片工作电流只有200uA,无需辅助绕组供电,简化设计,降低系统成本。WS3441 内部采用了独特的智能温度控制,可以轻易解决高温时灯闪的问题。WS3441 具有多重保护功能,包括LED 开路/短路保护、电流采样电阻短路保护和芯片过温保护。WS3441 提供8-Pin 的DIP-8 和SOP-8 封装。
应用领域■ 球泡灯■ 蜡烛灯■ 玉米灯■ 景观灯■ T5/T8■ 吸顶灯■ 平板灯
引脚功能说明引脚名引脚号功能说明GND 1 芯片地ROVP 2 输出开路保护电压调节端,接电阻到地NC 3 悬空脚,必须接地,参考下文中PCB 设计指导VCC 4 芯片电源端DRAIN 5,6 内部高压MOSFET 的漏极CS 7,8 电流采样端,接电流检测电阻到地。
功能描述WS3441 是一款专为LED 照明设计的恒流驱动芯片,应用于非隔离的降压型LED 电源系统。它内部集成500V 功率MOSFET,并且采用先进的恒流控制方法和源极驱动技术,只需要很少的外围元件就可以达到优异的恒流特性,系统成本低,效率高。启动系统上电后,线电压通过启动电阻对VCC电容充电,当VCC电压达到芯片开启阈值时,芯片开始工作。WS3441内部将VCC电压箝位到7.3V。
启动系统上电后,线电压通过启动电阻对VCC电容充电,当VCC电压达到芯片开启阈值时,芯片开始工作。WS3441内部将VCC电压箝位到7.3V。恒流控制,输出 LED电流设置WS3441 采用专利的恒流控制方法,只需要很少的外围元件,即可实现高精度的恒流输出。芯片逐周期检测电感的峰值电流,CS 端连接到内部峰值电流比较器的输入端,与内部400mV 阈值电压进行比较,当CS 电压达到内部检测阈值时,功率管关断。CS 比较器的输出还包括一个350ns 的前沿消隐时间。
电感峰值电流的计算公式:400 (mA)RICSPK =其中,RCS 为电流检测电阻阻值。LED 输出电流计算公式:2PKLEDI = I其中, IPK 是电感的峰值电流。线电压补偿WS3441 内置线电压补偿功能,使得LED 电流在全电压范围内都能保持一致,具有非常小的线性调整率,确保高的恒流精度。
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名称:超级杂交液(芯片)销售英文名:SuperHyb Solution for Chip产地:国产|进口规格:10mL编号:BTN130905产品简介:本产品为即用型芯片专用核酸杂交液,可用于各种核酸芯片杂交实验。运输及保存:低温运输和-20℃保存、有效期一年。更多有关超级杂交液(芯片)销售的价格及使用说明等,请联系我们的业务经理王欣女士咨询,我公司还销售以下产品:·即用型长片段PCR试剂盒编号:BTN90702 英文名称:Instant Long PCR Mix 规格:20次 产品简介:一般PCR法具有一定的局限性,特别是难以扩增5 Kb以上的长链DNA,这严重限制了PCR法的推广和应用。本产品通过改变PCR用DNA聚合酶、PCR用Buffer、PCR扩增条件等,使长链DNA的扩增成为可能。本产品可以很稳定的扩增出终长度小于15 Kb的片段。1.方便,试剂盒内含有Taq聚合酶和有校正功能的聚合酶的混合酶、dNTPs、MgCl2、反应缓冲液、PCR增强剂、上样染料等所有PCR所需要的成分,用户只需准备模板和引物既可以进行长片段PCR实验。2.快捷,操作步骤已经最大限度地简化,能减少污染,降低实验误差。3.各成分的浓度和比例都经过精心优化,反应的灵敏度高,特异性强。4.本产品A型含电泳染料,PCR反应液可直接上样电泳,进一步简化了操作。5.本制品中还配备了LA PCR 增效剂供用户选择使用,可以对扩增GC rich的DNA*(代'片')段、DNA重复序列、具有复杂立体结构的DNA*(代'片')段等发挥强大威力。6.成分中的稳定剂也使试剂更稳定。使用及效果:将本产品25 μ L与用户自备的模板,引物和水共25 μ L混合后,直接进行PCR反应(PCR参数由用户自己确定),反应结束后直接取10 μL电泳检查扩增结果。运输及保存:低温运输,-20℃保存,有效期一年。超级杂交液(芯片)销售关键词:SuperHyb Solution for Chip,BTN130905,芯片,超级杂交液(芯片)
·SDS-PAGE电泳液编号:BTN81203 英文名称:SDS-PAGE Running Buffer 规格:5L/20L 产品简介:本产品为干粉型SDS-PAGE电泳液,加水配制后即可直接用于SDS-PAGE电泳,非常方便。运输及保存:常温,有效期一年。·加T试剂盒编号:BTN60106 英文名称:dT Tailing Kit 规格:50次 产品简介:本产品利用Taq DNA polymerase的不依赖于模板的末端转移酶活性,在只有dTTP存在的情况下,在平末端的DNA*(代'片')段加上一个dT尾巴,主要用于制备T载体。本产品具有下列特点:1.简单,2×dT Tailing Buffer 中含有所需要的所有成分,不需要单独准备。2.适用于任何平末端的DNA载体。3.加T后的载体可以作为T载体使用。使用手册:在一干净的0.5 mL或1.5 mL离心管中,分别加入回收的DNA*(代'片')段(0.2-2μg)、25 μL 2×dT Tailing Buffer、1 μL Taq DNA polymerase(5 U/μL)并补水到50 μL,72℃保温2小时即可。运输及保存:低温运输,-20℃保存,有效期一年。·微量样品核酸提取试剂盒编号:BTN80930 英文名称:Tiny Sample DNA-RNAOUT 规格:50次/200次 产品简介:本产品是专用于从各种微量或痕量样品中提取DNA和RNA的纯化试剂。比市场上的同类产品相比,具有下列优点:1.核酸的回收率高,可以达到90%以上,可以跟国外进口的同类产品媲美。2.一管式操作,减少了样品污染的可能。3.一站式套装,除样品外客户不需要准备任何试剂,降低了实验误差。4.安全无毒,不需要使用苯酚和氯*(代'仿')等有机溶液。5.可以处理各种形态的样品,包括液体样品,单个或少量的细胞,微小胚胎等。6.与PCR、荧光PCR、RT-PCR、荧光RT-PCR 等后续反应兼容。7.试剂稳定,可以长期放置。使用及效果:将0.1mL液体样品(如果是斑痕等固体样品,需预先用自备缓冲液洗涤可能存在痕量核酸的区域得到液体样品)加入到1.5 mL离心管中,加入0.3 mL溶液A,振荡混匀,室温放置十分钟后,加入0.4 mL溶液B。振荡混匀后室温离心15分钟,小心吸弃上清后加入1 mL 溶液C,振荡混匀,室温离心5分钟,小心吸弃上清,最后将核酸沉淀直接用于PCR或RT-PCR反应或溶解到核酸溶解液中放-80℃待用。注:微量样品中所提DNA和RNA一般含量极少,不宜用电泳法检测。运输及保存:常温运输,4℃保存,有效期一年。超级杂交液(芯片)销售关键词:SuperHyb Solution for Chip,BTN130905,芯片,超级杂交液(芯片)
ARB11811 人睾酮(T)elisa检测操作说明书 Human testoterone,t ELISA KIT苯并咪唑 Gallamine triethiodide 51-17-2BTN100823 干粉型SOC培养基 SOC Medium Powder锌试剂 Maltitol 62625-22-3或56484-13-0F030809 BIOTIN标记山羊抗小鼠IgG3抗体 Goat Anti-Mouse IgG3*BIOTINF030441 胶体金标记小鼠抗鸡IgY(IgG)抗体 Monoclonal Mouse Anti-Chicken IgY*GOLD丫啶黄素 Potassium gluconate 8048-52-0PL0201 质粒小量快速提取试剂盒(离心柱型)乙酰胺甲氧基苯 500mlPY04-018 西红柿浸出液 40ml/瓶 每瓶添加于100mlBBL琼脂培养基中,用于食品微生物中双歧杆菌的菌落计数及菌种鉴定 叔丁氧羰基-甲苯磺酰基-精氨酸 Arsenazo I 13836-37-8BL0727 Phenobarbital 总超氧化物歧化酶(SOD)检测试剂盒(NBT核黄素微板法) 100TF030436 胶体金标记山羊抗猪IgG抗体 Polyclonal Goat Anti-Pig IgG*GOLDHC0261 Eppendorf大容量电动移液器α-L-岩藻糖苷酶 Sudan black B 9037-65-4
北京百莱博科技有限公司专业生产供应销售生物试剂、化学试剂、抗原抗体、血清血浆、elisa试剂盒,更多试剂产品需求,欢迎来电咨询选购超级杂交液(芯片)销售。
工厂直销店铺 欢迎批发 质优价廉! 翻盖弹片老化座,QFN28-0.5 HMILU自有品牌,大量现货当天发! 【0.5间距/不带板】
QFN28翻盖弹片测试座
产品简介
产品用途 | 编程座、测试座,对QFN28的IC芯片进行烧写、测试 |
---|---|
适用封装 | QFN28引脚间距0.5mm |
测试座 | QFN28-0.5 |
特点 | 底部引出引脚为不规则排列 |
规格尺寸
QFN28编程座/测试座适用芯片详细规格,以及适配座外形尺寸:
型号 | 引脚间距(mm) | 脚位 | 芯片尺寸 | |||
---|---|---|---|---|---|---|
QFN-28-0.5 | 0.5 | 28 | 5*5 |
【英语名称】:Pre-Sure Histone H3 Peptide Array ELISA Kit (Colorimetric) (96 assays)
【中文名称】:预包被组蛋白H3多肽芯片ELISA试剂盒(96次)
【产品类型】:细胞分析试剂盒【供应商】:Epigentek
【产品货号】:P-3104-96
【产品规格】:96次分析
Epigentek
【背景资料】:组蛋白修饰是一种表观遗传修饰.翻译后的组蛋白修饰包括组蛋白乙酰转移酶介导的组蛋白赖氨酸残基乙酰化,组蛋白去乙酰化酶介导的去乙酰化,组蛋白甲基转移酶介导的赖氨酸和精氨酸的甲基化,组蛋白去甲基化酶介导的去甲基化,组蛋白磷酸化酶可以特定丝氨酸磷酸化,其他的修饰包括泛素化,SUMO化和聚ADP-核酸单位.除了DNA甲基化之外,组蛋白乙酰化和甲基化是最重要的表观遗传标记.总的说来,H3-K4, H3-K36或是H3-K79的三甲基化会导致一个开放的染色质构型,因而是常染色质的代表.常染色质以很高的组蛋白乙酰化为标志,而此特点是组蛋白乙酰化酶介导的.赖氨酸残疾可以被单、双或是三甲基化,每一种都可以不同程度上调节染色质结构和转录.还有其他的组蛋白修饰,比如磷酸化,这些修饰可以有不同的组合.以上这些组合形成了一个“组蛋白密码”,可以通过不同的细胞因素进行解读.
【保存建议】:请在您收到Epigentek的预包被组蛋白H3多肽芯片ELISA试剂盒(96次)产品后,参考说明书建议,使用不同的保存条件或温度来保存试剂盒内组分.
【产品说明】:点击:预包被组蛋白H3多肽芯片ELISA试剂盒(96次)查看更详细产品说明,更多应用、储存、价格、货期等信息请致电400-6800-868垂询Epigentek中国区域授权总代理艾美捷科技有限公司。
Epigentek集团公司是全球领先的创新技术和表观遗传学相关研究产品的开发商和供应商.公司开发了包括400多个专利产品的全面的产品组合,为表观遗传学方面的研究和新药研发提供全面系统的解决方案.作为多家知名品牌的代理,艾美捷与Epigentek一起为研究者们提供最好、最新的表观遗传学研究工具而不断扩大产品及服务质量.
X2522光纤网卡,采用FPGA芯片,延迟更低,支持10GB、25GB两种标准速度传输。
The X2522 dual-port 10/25G Ethernet NIC is a member of the X2 family of XtremeScale products that redefine the price/performance of standard NICs for modern data centers. Designed from the ground up for virtualized dense server environments, Solarflare XtremeScale X2 adapters are the most cost-effective NICs in the industry for Ethernet connectivity. At the same time, XtremeScale acceleration provides record-breaking low latency and throughput needed for today’s modern class of applications. X2 is the most secure standard NIC with integrated hardware firewalls. XtremeScale X2 is the only general-purpose NIC with 2,048 Virtual NICs, programmable packet processing engine for network off-load and real-time packet/flow capture required by your network performance management and analytics platforms. Acceleration Services Allow Distributed Apps to Scale-Out – The challenge with distributed apps is keeping hardware and system latency low, while scaling to thousands of tasks running across thousands of cores. The X2522 harnesses kernel bypass acceleration technology to deliver superior small packet performance with latency as low as one-half microsecond. Solarflare kernel bypass technologies include Onload?, ScaleOut Onload and DPDK acceleration services provide servers the headroom needed to handle more processes in the same amount of time and/or with less servers. Solarflare acceleration technology can also be used in to build ultra-low latency NVMe all-flash storage fabrics. X2522 NICs configured for NVMe over standard TCP--and with kernel bypass acceleration--provide the same performance as NVMe fabrics based on special-purpose RDMA fabrics. Precision Time Stamping for Accurate Synchronization - The X2522 supports the precision timing protocol (PTP) fabric service for apps that require synchronized time stamping of packets down to the single-digit nanosecond. Protect Traffic “Inside” the Data Center by Deploying the Industry’s 1st Standard NICs with HW Security On-Board – ServerLock? technology inside every standard X2522 NIC complements firewall perimeter security. It is now possible to scale security inside your data center by using micro-segmentation to scale packet surveillance, filtering, cloaking and firewalling with every server. Real-Time Telemetry Feeds NPM & Analytics - The X2522 provides real-time monitoring, inspection and capture of packets needed for network performance management, security analytics, or compliance. Packet data can be forwarded to a libpcap API or saved to a file with hardware timestamps. A Platform for Micro-Segmented NIC Fabric Services - For modern data centers, X2522 lays a new foundation for NIC-based network virtualization needed for their highly distributed applications with thousands of inter-connected web server, machine learning and big data workloads. X2522 is the first and only standard NIC platform that can establish ultra-scale connectivity to thousands of virtual NICs, while at the same time providing real-time packet and flow information. The combination of ultra-high bandwidth, ultra-low latency, ultra-scale connectivity and packet telemetry, allows X2522 NICs to serve as the Industry’s first commercial platform for micro-segmented NIC fabric services that scale with each server, VM or container. The Most Cost Effective NICs in the Industry – Solarflare makes data center-wide deployment of these capabilities cost-effective. Although X2522 NICs provide superior performance and the SmartNIC-like ability to enable network services, a 25GbE X2 NIC from Solarflare offers a cost advantage over comparably configured NICs from market share leaders Broadcom, Intel and Mellanox. Summary of Features and Benefits The World’s Lowest Latency 10/25G Ethernet NIC The Industry’s 1st Standard NIC with HW Security The Solarflare Advantage ? Lower Cost – We invite you to compare. The X2522 is flat-out the most cost-effective 10/25G NIC. ? Scale Higher - The only standard 10/25G NIC with half-microsecond latency, and the ability to segment a single NIC into thousands of vNICs or 8x competitive NICs. ? Together, ultra-low latency and ultra-scale connectivity power a more efficient data center that scales higher with more workloads per server and/or less servers. ? See how the X2522 accelerates NGINX load balancing by 400%, Redis database caching by 400%, and NGINX web servers by 40%. ? Secure Every Server - The first and only solution allowing IT organizations to deploy a layer of security on every server using a generalpurpose NIC. ? Network Visibility - Only standard NICs from Solarflare provide valuable real-time packet and flow data for you to monitor, capture and analyze. PRODUCT BRIEF XtremeScale? X2522 Copyright ? 2018 Solarflare Communications, Inc. All rights reserved. PRODUCT BRIEF Acceleration Universal Kernel Bypass DPDK Poll Mode Driver - Packet (Cloud, Telco) ScaleOut Onload - TCP (Cloud, Telco, Enterprise) Onload - TCP/UDP (Fintech) TCP Direct - TCP/UDP (Fintech) MSI-X Support 2x25G 64-byte line rate Interrupt Coalescing Security ServerLock? Local Hardware Filtering - Monitor, report, analyze, filter and enforce policies Tamper resistant adapter – Digitally signed firmware and secured private keys Time Synchronization and Hardware Timestamping Hardware timestamping for all packets, sent and received including PTP. On-board Stratum 3 compliant oscillator Solarflare Software PTP Daemon delivers enhanced stability and clock synchronization accuracy and can be used to synchronize the adapter clock to external time source Stateless Offloads TCP/UDP Checksum Offload (CSO) TCP Segmentation Offload (TSO) Giant Send Offload (GSO) Large Send Offload (LSO) Large Receive Offload (LRO) Receive Side Scaling (RSS) Receive Segment Coalescing (RSC) Manageability and Remote Boot PXE and UEFI Solarflare Secure Boot Tamper resistant Secure Firmware Upgrade MCTP SMBus MCTP PCIe VDM Management and Utilities Ethtool Support vCenter Plug-in Solarflare Boot Manager Adapter Hardware PCIe Gen 3.1 x8 25G SFP28 or 10G SFP+ direct attach copper or optical transceiver; SFP28 cages. XtremeScale? SFC9250 Ethernet Controller Hardware Certifications FCC, UL, CE RoHS - Complies with EU directive 2011/65/EU Traffic Engineering XtremePacket? Engine for dedicated parsing, filtering, and flow steering TCP/UDP/IP, MAC, VLAN, RSS filtering Accelerated Receive Flow Steering (ARFS) Transmit Packet Steering Storage NVMe-TCP Plug-in for low latency, high performance storage networking on standard Ethernet fabric Virtualization Microsoft Hyper-V Virtual Machine Queue (VMQ) SR-IOV: 16 physical functions; 240 virtual functions 2048 Guest OS protected vNICs Full hardware switch fabric in silicon capable of steering any flow based on Layer 2 to Layer 4 protocols, between physical and virtual interfaces. VXLAN, NVGRE, and GENEVE tunneling offloads; adaptable to custom overlays. VLAN and VLAN Q-in-Q Insertion/Stripping Ethernet Standards IEEE802.3-2012 Ethernet Base Standard, including 802.3bx IEEE 802.3-2015 (10/25Gb) Ethernet Flow Control IEEE 802.3by Ethernet consortium 25 Gigabit Ethernet IEEE 802.3ad, 802.1AX Link Aggregation IEEE 802.1Q, 802.1P VLAN Tags and Priority IEEE 1588- 2008 PTPv2 Jumbo Frame support (9000 bytes) OS Support Red Hat RHEL, SUSE SLES, Debian, Ubuntu Windows Server VMware ESXi For complete list of supported OS versions visit: http:// support.solarflare.com Physical Dimensions L: 16.75 cm (6.6 in) W: 6.9 cm (2.7 in) End bracket height: PCI Express standard, 12.0 cm (4.725 in) PCI Express low-profile: 7.92 cm (3.12 in) Environmental Requirements Temperature: Operating: 0°C to 55°C (32°F to 131°F) Storage: –40°C to 65°C (–40°F to 149°F) Humidity: Operating: 10% to 80% Storage: 5% to 90% Ordering Information X2522, X2522-PLUS For more information please visit: solarflare.com Contact Us: US +1 949 581 6830 UK +44 (0) 1223 477171 HK +852 2624 8868 Email: sales@solarflare.com Specifications SF-119854-CD Issue 4 X2522 Product Brief 041618 Note: Feature availability is dependent on software release support. 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PC210通用型压力变送器是盖林自动化在广泛深入调查的基础上,结合国际先进产品技术及应用实例自行研发设计的新一代压力变送器。该产品为专有技术生产,采用进口敏感元件和精密设计的电路与装配工艺制作而成。具有寿命长、运行稳定、测量范围广、造价低、外观精巧等优点。
产品激光打标视频
地址:http://vodcdn.video.taobao.com/oss/ali-video/4b1bc44ae59845f984915f664e964db3/1458812076/video.mp4
产品特点
性价比高,为OEM客户专门设计、生产进口的敏感元件具有卓越的抗腐蚀、抗冲击和过载、抗震动、抗磨损性能工作温度范围宽、测量综合精度高、长期稳定性好精密设计与规模化生产保证了产品的先进性、实用性和质量稳定性量程范围宽:从真空到100MPa,并具有正负表压量程
产品用途
设备自动化
工程机械
医疗设备
泵及压缩机 能源及水处理系统
农机设备
内燃机
测试架
机车刹车系统
液压与气动系统
空调机组与冷冻设备
性能参数
测量范围 | 表压 0~1KPa、5KPa、10KPa、100KPa、1MPa...100MPa 量程范围内可选 负压 0~-1KPa、-10KPa、-20KPa、-30KPa……-100KPa 量程范围内可选 绝压 0~50KPa、100KPa、1MPa...3.5MPa 量程范围内可选 复合压 -1KPa~1KPa、-10KPa~10KPa、-100KPa~20MPa 量程范围内可选 |
过载能力 | 2倍满量程压力(其中100MPa的产品过压为1.1倍满量程压力) |
压力类型 | 表压、负压、绝压、复合压 |
测量介质 | 与316不锈钢兼容的气体或液体 |
综合精度 | ±0.25%FS、±0.5%FS、±0.75%FS |
长期稳定性 | ≤±0.2%FS |
零点温度漂移 | 典型:±0.02%FS/℃、最大:±0.05%FS/℃ |
灵敏度温度漂移 | 典型:±0.02%FS/℃、最大:0.05%FS/℃ |
工作温度 | -40~85℃ |
补偿温度 | -10~60℃ |
供电范围 | 12~36VDC(一般24VDC) |
信号输出 | 4~20mA、1~5VDC、0~5VDC、0~10VDC、0.5~4.5VDC |
负载电阻 | ≤(U-12)/0.02Ω |
外壳防护 | 插头型IP65、电缆型IP67 |
重 量 | 约0.3公斤 |
响应时间 | ≤2 ms |
分辨率 | 理论上无限小、通常1/10000 |
过程连接 | 见产品选型表和过程连接图(可定制) |
电气连接 | 见产品选型表和电气连接图(可定制) |
接口及壳体 | 不锈钢1Cr18Ni9Ti |
密封圈 | 氟橡胶 |
传感器膜片 | 不锈钢316L |
型号 | 工作频率 (KHz) | 超声功率比 | 随机变幅杆 | 破碎容量 (ml) | 可选 配变幅杆 | 样品温度保护 | 价格 (元) |
QZ-150Y | 22±1 | 1%-99%(5-150W) | Φ6 | 0.2-200 | Φ2、Φ3 | 室温-99℃ | 12800 |
QZ-250Y | 22±1 | 1%-99%(10-250W) | Φ6 | 0.2-350 | Φ2、Φ3 | 14600 | |
QZ-650Y | 22±1 | 1%-99%(10-650W) | Φ6 | 0.2-600 | Φ2、Φ3、Φ10、Φ12 | 16800 | |
QZ-1000Y | 22±1 | 1%-99%(10-1000W) | Φ6或Φ10 | 0.2-1000 | Φ2、Φ3、 Φ12、Φ15 | 19800 | |
QZ-1200Y | 19-23 | 1%-99%(10-1000W) | Φ20 | 50-1200 | Φ12、Φ15、Φ22 | 24800 | |
QZ-1500Y | 19-23 | 1%-99%(10-1000W) | 20或Φ22 | 200-1600 | Φ12、Φ15、Φ22 | 29800 | |
QZ-1800Y | 19-23 | 1%-99%(10-1000W) | 20或Φ22 | 200-2000 | Φ12、Φ15、Φ22 | 32800 |