1·Then, if needed, the pipe undergoes heat treatment or just goes to the quality testing line.
然后，如果有需要，这些管子将经过热处理或者直接进入质量测试环节。
2·Unfortunately, though flat tappets from China are cheap, their metallurgy is suspect-and the same goes for the quality of their machining, heat treatment and surface-hardening.
不幸的是尽管中国制造的平头挺杆物美价廉，但是其冶金技术遭到质疑，加工、热处理、表面硬化质量也遭质疑。
3·Successful heat treatment requires close control over all factors affecting the heating and cooling of a metal.
热处理要想顺利进行，必须对所有影响金属加热与冷却的因素进行严格控制。
4·Heat treatment shall consist of normalizing normalizing and tempering or quenching and tempering.
热处理包括正火、正火和回火或者淬火和回火。
5·With strong heat treatment and processing capacity.
具有较强热处理及加工能力。