Oil is supplied to the crosshead using a swinging arm or a () and is sometimes boosted in pressure to and efficient lubrication.
When a vessel is swinging from side to side off course due to quartering seas,the vessel is ().
Stress on the topping lift of a swinging boom can be reduced by().
Oil is supplied to the crosshead using a swinging arm or a () and is sometimes boosted in pressure to and efficient lubrication.
The center of gravity of a freely swinging load suspended from a pedestal crane acts as if it were located at the().