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Worm gear butterfly valve
详细资料：
详细资料：
Copyright 2016 Yongjia Xintong valve manufacturing co., LTD All Rights Reserved. Address：Linyang Gongye Road 5,Sanqiao Industry Zone, Oubei, Yongjia, Wenzhou.
Tel：0577-67358935 Address：0577-67352802 Url：
http://www.xintong-valve.com
