steel hardening oil
... 钢材淬火油 steel hardening oil 钢材打印跨 marking bay 钢材划线用墨 steel ink ...
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淬火裂纹：裂纹在钢材的淬火或淬火后形成，由于冷却时的高应力所造成；也有可能是在淬火油中的水所导致。
Quench Cracks: Cracks formed in a steel part during or after quench, resulting from high stresses in cooling; could be caused by water in the quench oil.
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