题目内容

钢材牌号“20g”中的“g”表示锅炉钢。()

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触电急救的首要措施是使触电者迅速脱离电源。()

焊后进行退火处理的作用是为了消除焊件的残余应力。()

_________________is an office organization system which involves multiple workers using a single physical work station or surface during different time periods.

当CE>0.6%时,钢材的淬硬小,焊接性优良。()

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