Sewage pipe
Angang Group Yongtong Ductile Cast lron Pipe Co., Ltd.
Ceramic elbow
Hebei Longrun Pipeline Group Co., Ltd.
Household Natural Gas Detector CH4
Jinan Benan Technology Development Co., Ltd.
Piping
Yanda (Haimen) Heavy Equipment Manufacturing Co., Ltd.
ERW Welded Pipe (Black Pipe and Hot-dip Galvanized Steel Pipe)
Handan Zhengda Steel Pipe Co., Ltd.
Bent pipe
Henan Huadian Jinyuan Piping Co., Ltd.
TPEP anti-corrosion steel pipe
Shandong Shengbao Heat Transfer Technology Co., Ltd.
HTLe type low temperature self-limiting electric heating tape
Wuhu Jiahong New Material Co., Ltd.
Thermal flowmeter sensor
Jinzhou Jingwei Instruments Co., Ltd.
Pipeline electric heat tracing system
Shandong Huaning Electric Tracing Technology Co.,Ltd.
Pipeline Pipe
Hengyang Valin Steel Tube Co., Ltd.
Intelligent mowing robot
Tiefriends automation technical（beijing）Co.Ltd.
TLH-F98-AJ Series High-Precision Fiber Optic Gyroscope
I-NAV Technology Co., Ltd.
Seamless Steel Pipe
Dexin Steel Tube (China) Co., Ltd.