TianJin Hessing Tech Equipment Co., Ltd.
TianJin Hessing Tech Equipment Co., Ltd.
TianJin Hessing Tech Equipment Co., Ltd.
 天津市合兴泰科机电设备有限公司
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There is excess solid zinc in the inner wall of pipe, bad appearance quality and more zinc consumption, How to solve this problem?

There is excess solid zinc in the inner wall of pipe, bad appearance quality and more zinc consumption, How to solve this problem?

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天津市合兴泰科机电设备有限公司
天津市合兴泰科机电设备有限公司