A driven plate and a cylinder are inside the clutchdrum of each clutch mechanism, and ring-shaped primary and secondary springs are placed between the driven plate and the cylinder.
在各离合器机构的离合器滚筒的内部中的从动板与活塞之间分别设有环状的母蝶形弹簧以及子蝶形弹簧。
2
The driller disengages the drumclutch and secures the drawworks.
司钻摘掉辊筒离合器，刹住绞车。
3
The driller engages the drawworks in forward drive and sets the throttle at minimum speed. And engages the low clutch and slowly spools the drilling line on the drawworks drum.