BS EN ISO 683-4 2018 Heat-treatable steels, alloy steels and free-cutting steels - Free-cutting steels.pdf文档页数：30文档大小：855.2KB文档格式：pdf BS EN ISO683-4:2018 BSI Standards Publication Heat-treatable steels alloy steels and free-cutting steels P...

BS EN 12504-4-2021 结构中的混凝土试验. 第4部分 超音波脉冲速率的测定.pdf文档页数：18文档大小：8.36MB文档格式：pdf BSEN12504-4:2021 BSI Standards Publication Testing concrete in structures Part 4:Determination of ultrasonic pulse velocity bsi. BSEN12504-4:2...

ASTM E3193-20 用火焰原子吸收分光光度法（FAAS）测定灰尘、油漆和土壤中铅的标准试验方法.pdf文档页数：9文档大小：4.88MB文档格式：pdf This international standard was developed in accordance with internationally recognized principles on standardization establis...

ASTM F3338-20 通用航空飞机电力推进装置设计标准规范.pdf文档页数：13文档大小：7.8MB文档格式：pdf This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles...