1, WWG non-negative pressure water supply equipment of Qingdao Lisan Group Co., Ltd. Beijing Branch, XMW non-negative pressure water supply equipment of Oceania brand produced by Shanghai Panda Machinery Co., Ltd., ZWG non-negative pressure water supply equipment produced by Shandong Zhongyue Water Supply Equipment Co., Ltd., ZWX-7 intelligent non-negative pressure water supply equipment produced by Shandong Weifang Zheng Da Hydropower Equipment Engineering Co., Ltd. and SBH non-negative pressure water supply equipment produced by Shandong Zibo Lu Hua Water Supply Equipment Co., Ltd.
2. ZWL non-negative pressure water supply equipment produced by Shandong Shuanglun Group Co., Ltd., ZWJ non-negative pressure water supply equipment produced by Beijing Weidewang Trading Co., Ltd., 2GB- 1 non-negative pressure water supply equipment produced by Beijing Nuoxing Technology Development Co., Ltd., ZWL non-negative pressure water supply equipment produced by Shanghai Liancheng Co., Ltd. and RCDW non-negative pressure water supply equipment produced by Jiangsu Yancheng Ruichi Pump Co., Ltd.