冲压件破裂主要有哪些原因?
《中华人民共和国认证认可条例》所称认可,是指由认可机构对()以及从事评审、审核等认证活动人员的能力和执业资格,予以承认的合格评定活动。 ["认证机构、检查机构、实验室","认证机构","检查机构","实验室"]
Using an inert gas system on a tanker has which advantage(s)? () ["Provides for faster loading","Lowers oxygen content in the tank","Provides better fuel economy","All of the above"]
以下哪些属于新标准基础客户融资业务日均统计范围?() ["A.票据贴现","B.非标准债权投资","C.委托贷款","D.黄金租借"]
ProE中的扫描特征包括以下几种形式()。 ["伸出项","切口","曲面","混合"]
检验夹具的作用是什么?