What's the safe working load of each derrick?
每根吊杠的安全工作负荷是多少？
Keep safe working load of derricks.
让吊杆在安全负荷下工作。
What is the safe working load of the bitts in the bow area?
船首区域缆桩的安全工作负荷?。
The high load structure, automatic turn bag set, make it safe and reliable.
高负荷结构，自动翻包装置，安全可靠。
The high load structure, automatic turn bag set, make it safe and reliable.
高负荷结构，自动翻包装置，安全可靠。
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