martempering oil

例句：

1. 1. This martempering oil isused to temper steel before it is machined.
   这种马氏调质油用于在钢材被加工前进行热处理。
2. 2. The engineerused this martempering oil to improvethe quality of the machined parts.
   工程师使用这种马氏调质油来提高机器部件的质量。
3. 3. The martempering oilwas carefully mixed with the steel to ensurea smooth and even surface.
   这种马氏调质油被小心地与钢铁混合，以确保表面光滑且均匀。