JIS C 8201-4-1-2020 低压开关柜和控制装置 第4-1部分:接触器和电动起动器 机电接触器和电动起动器.pdf文档页数:118文档大小:45.45MB文档格式:pdf JIS 低压開閉装置及制御装置一 第4-1部:接触器及毛一夕又夕一夕: 電氨機械式接触器及毛一夕又夕一夕 JISC8201-4-1:2020
ASTM E1839-20 造纸工业用杀粘剂效力的标准实施规程 细菌和真菌粘液.pdf文档页数:4文档大小:2.11MB文档格式:pdf This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision o
ASTM E3241-20 设施、地方应急计划委员会和应急响应者之间协调和合作的标准指南.pdf文档页数:5文档大小:2.85MB文档格式:pdf This international standard was developed in accordance with internationally recognized principles on standardization established in the
API Spec 5CRA-2022 用作套管、油管、接箍料和附件材料的耐蚀合金无缝产品.pdf文档页数:151文档大小:58.06MB文档格式:pdf Corrosion-resistant Alloy Seamless Products for Use as Casing TubingCoupling Stock and Accessory Material API SPECIFICATION 5CRA SECOND ED