According to Dave, this required that the grease be changed every two weeks in each of the boiler's four hydro grates.

据戴夫，这就要求改变油脂每两个星期在每个锅炉的四个水电炉。

youdao

According to Dave, this required that the grease be changed every two weeks in each of the boiler's four hydro grates.

据戴夫，这就要求改变油脂每两个星期在每个锅炉的四个水电炉。

youdao