patent block meaning in English
通用滑车
Examples
- With metal pipe unions to replace the plastic ones greatly raises the reliability of installation and extends the duration , the patent block - up preventive structure makes it of an excellent performance of block - up resistance
以金属管接头取代塑料体，大大增强安装的可靠性，延长使用寿命，专利防堵塞结构，使其具有优良的防堵性能。