平面內(nèi)墻頂棚蓋板型變形縫 ZKNQ-GB-P
轉角內(nèi)墻頂棚蓋板型變形縫 ZKNQ-GB-L
1.simple structure, large scalability, no screw on surface
2.commonly-used in indoor equipment.
Disadvantages:
Due to the reason of its own structure, the outer base is not completely on the same level with the cover board.