Access doors and panels in a zone are identified by the zone number and a two or three letter suffix. 区域内的门禁门和面板由区域号和两个或三个字母的后缀来标识
A.Access doors and panels within the area are recognized by the number of the area and two or three letter suffix. B.The area number and a postfix with two or three letters identifies the access doors and panels in an area. C.The identification of the access panels and doors is accomplished by the zone number suffix.正确答案B
