支撑皮带 meaning in Chinese

back up belt

Louvered window is made of aluminum alloy , with special pneumatic open and shutting sructure to ensure the window completely open and shut , it can be in storm proof , rain proof and dust proof of carring belt rotary , which get the national patent
百叶窗采用铝合金，具有独特的气动式开闭机构，保证百叶窗完全打开或关闭，百叶窗达到防风，防雨，防尘采用支撑皮带转动，已获得国家专利。