Zibo Zengrui Chemical Co., Ltd

LEWA is a worldwide leading manufacturer of diaphragm metering pumps, process pumps, complete metering systems and plants. The company was founded in 1952. We have grown since our founding in 1952 and are now represented by 14 subsidiaries and over 1

Suzhou Qingbang Machinery Co., Ltd. (referred to as HNK). With leading technology and raw materials, we provide you with the most advanced nitrogen gas separation equipment and high-quality services. Qingbang Company is in a new round of planning and