我想問 acting , Unlatched,中文點解

Double-acting = 復式作用的, 雙重作用的
Double acting door (雙推拉門) is a door equipped with hardware that permits it to swing to either side of the plane of its frame.

Double-leaf = 雙翼的
Double-leaf door (雙扇門) is a door that has two adjacent independent panels hinged on each side of the doorway. 

Latched –上閂

Unlatched -沒有鎖的

PALUSOL -德國公司BASF 注冊的商標 - 防火板 (The trademark owned by BASF – fire-resistant panel.)