Inspection air pressure test(with water head) for No1. water ballast tank(No15 block).

No1压载水舱（No.15分段）气压试验（压头试验）检查。

youdao

Inspection air pressure test(with water head) for No1. water ballast tank(No15 block).

No1压载水舱（No.15分段）气压试验（压头试验）检查。

youdao