Take the door knob off a door and put it back on backwards, then lock it and leave the door open.
取下门把手，装到门的另一侧，并且让门开着。
A bolt on a lock that is moved by turning the key or knob without activation of a spring.
一种锁闩，在没有弹簧的作用下，靠转动钥匙或把手使它移动。
All have a reversible thumb knob for one-hand easy opening and spring-loaded lock for closing.
逆向拇指把柄，一只手就可以将其轻松打开或闭合。
Model UHH-2 is compliant for use inside of the crew cab. Place the helmet hook on the red knob and pull the strap up to lock the helmet in place.
UHH-2型头盔支架适合在双排座驾驶室内使用，将头盔挂钩置于红色把手上，拉动绷带使头盔固定。
Model UHH-1 is compliant for use inside of the crew cab. Place the helmet hook on the red knob and pull the strap up to lock the helmet in place.
UHH-1型头盔支架适合在双排座驾驶室内使用，将头盔挂钩置于红色把手上，拉动绷带使头盔固定。
Model UHH-2-C is compliant for use inside of the crew cab. Place the helmet hook on the red knob and pull the strap up to lock the helmet in place.
UHH-2-C型头盔支架适合在双排座驾驶室内使用，将头盔挂钩置于红色把手上，拉动绷带使头盔固定。
Model UHH-2-C is compliant for use inside of the crew cab. Place the helmet hook on the red knob and pull the strap up to lock the helmet in place.
UHH-2-C型头盔支架适合在双排座驾驶室内使用，将头盔挂钩置于红色把手上，拉动绷带使头盔固定。
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