![]() Semiconductor devices—Integrated circuits—Part 21:Sectional specification for film integrated circuits and hybrid film integrated circuits on the basis of the Qualification approval procedures 半导体器件-集成电路-第21部分:膜集成电路和混合膜集成电路分规范(采用鉴定批准程序)半导体器件-集成电路-第21部分:膜集成电路和混合膜集成电路分规范(采用鉴定批准程序) |
![]() Friction stir welding—Aluminium and its alloys—Part 3:Qualification of welding operators 搅拌摩擦焊 铝及铝合金 第3部分:焊接操作工的技能评定 |
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