?nbsp;长寿命、低干扰
?nbsp;高负厊/span>
?nbsp;调速功胼/span>
?nbsp;保护功能?nbsp;免维护、无污染传输
?nbsp;允许介质气体富含水汽
?nbsp;耐腐蚀性良奼/span>
?nbsp;安装无限刵/span>
