Changbao Co., Ltd. received a notice from the Petroleum Pipeline Procurement Department of China National Petroleum Corporation recently. In the bidding procurement of API oil tubing and tubing, seamless casing and seamless casing in CNPC's domestic API 2011, the company’s oil products p
Wuhan's 100 hybrid buses were put into operation, and the national "Ten City Thousand Vehicles" electric vehicle program was formally launched, thus opening an ice-breaking journey for the industrialization of new energy vehicles. At the same time, the national automobile industry re
1, power on, the key: press the "open" button to open, LCD display measurement status; press the "off" key, the instrument off, cut off the power. 2. The quick connector can be checked by connecting the tested instrument with the high pressure hose. 3. When using the