Each frame to doors fitted with a mortice lock is to be slotted for bolt, correctly positioned and to have a mortice cap welded on at back of perforation.

 
  • 为匹配安装暗锁的门,每个框要为锁舌开槽,通过在其后打孔,在槽内焊接榫帽,使其正确就位。
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