拔去钥匙后手柄就不能转动，门也就不能开启。
The handle can not be turned after unfixing key, and also the door can not be unlocked.
手动释放手柄：停电时可以用手动操作车库门。
Move to release the hand handle: Have a power fail can move to operate the garage door by hand.
检修门应该配置铝冲落手柄，使其不会伸到盖子上方； 在释放柄上，配置红色乙烯把手的自动开启把柄。
The access door shall be equipped with a flush aluminum drop handle, which shall not protrude above the cover and an automatic hold-open arm with red vinyl grip on a release handle.
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