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墻面卡鎖型變形縫（IL2）

內外墻區別：外墻配止水帶，內墻、頂棚不配

——卡鎖型內外墻變形縫(伸縮縫)有如下特點：

外觀整潔，連接平順，堅固穩定，卡鎖式固定，安裝維修方便

--Lock interior and exterior distortion seam (type adjustable seam) device has the following characteristics :

Neat in appearance and connection smoothness , firmly fixed , card lock type , easy installation and maintenance .