winchn.绞车v.用绞车吊拉winch worm shaft bushing绞车蜗杆衬套winch worm housing cover绞车蜗杆壳盖winch worm bearing cover绞车蜗杆轴承盖winch drum sliding clutch绞盘鼓筒滑动离合器winch traction cultivator绞盘绳索牵引中耕机winched launch of gliders绞车牵引滑翔机起飞winch for electric logging电测绞车winch drum clutch shift fork绞盘鼓筒离合器拨叉Winches and main towing gear绞车和主要拖航索具winch worm gear case bushing绞车蜗轮轮壳衬套