martensite start temperature

例句：

1. 1. The steel is being cooled downto its martensite start temperature.
   钢材正在冷却到它的马氏体开始温度。
2. 2. The process of recrystallization requires careful control of the martensite start temperature.
   再结晶过程需要仔细控制马氏体开始温度。
3. 3. The engineerused a thermometer to measure the martensite start temperature of the alloy.
   工程师使用温度计测量合金的马氏体开始温度。