所有救生艇吊柱的滑轮和滚轮拆开检查、清洁、加油并装妥。

All sheaves and rollers of the life boat davit need to be overhauled, cleaned, greased and reassembled.

youdao

所有救生艇吊柱的滑轮和滚轮拆开检查、清洁、加油并装妥。

All sheaves and rollers of the life boat davit need to be overhauled, cleaned, greased and reassembled.

youdao