同义词： keep open keep save
Hold Point Open慢着点开
Hold-open time保持开门状态时间
hold-open door常开门
hold-open catch固定卡销
Hold it open别关
Hold-open device枪栓固定卡榫
door hold-open device保持门开启装置
door hold-open detection保持门开启探测器
hold-open operating lock舱盖打开时的锁挡;炮塔门开启状态固定销
同义词：keep openkeepsave