试题与答案

气源过滤精度应为() A.小于0.5um B.小于o.6um C.小于0.7um D

题型:单项选择题

题目:

气源过滤精度应为()

A.小于0.5um

B.小于o.6um

C.小于0.7um

D.小于0.8um

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析:胶合板是用数张(奇数张)由原木沿年轮方向旋切的薄片,使其纤维方向相互垂直叠放经热压而成。纤维板是以植物木纤维(如树皮、刨花、树枝等)为主要原料,经破碎浸泡,研磨成木浆,加入一定量的胶合...

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