The toothed bars are capable of draining rainwater on the external wall so as to prevent rain water from permeating into the room through the hollow building block.
本发明所述的凸齿条能排除外侧墙面附着的雨水，可防止雨水通过空心砌块渗透到屋内。
The toothed bars are capable of draining rainwater on the external wall so as to prevent rain water from permeating into the room through the hollow building block.
本发明所述的凸齿条能排除外侧墙面附着的雨水，可防止雨水通过空心砌块渗透到屋内。
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