对合金钢管或壁厚大于()毫米的管子,焊完后必须按规定要求进行热处理。
参考答案:36
________ is where he gets all his money from.
A.What I can’t understand it
B.That I can’t understand
C.What I can’t understand
D.Which I can’t understand it
钢轨伤损标准规定,轨端或轨顶面剥落掉块,其长度超过30mm,深超过8mm,应判为()。