拉臂 meaning in English

arm drag
draw arm
single arm-drag

Old ) breaststroke is a well timed synchronization of arm pulls and leg kicks
老:蛙应该是拉臂蹬腿的紧密配合
Old ) butterfly forward movement is caused by arm pull and hip movement upwards
老:蝶向前是靠拉臂上提臀促成
Full - automatic tyre changer with push - pull horizontal arm and tilt back vertical arm , pneumatic locking , instead of semi - automatic and manual locking method , improve the working efficiency
此款为全自动推拉臂、后倾式立柱的气动锁紧机型，取代了半自动的手动锁紧的低效率方式。