MT / T765-1997 People's Republic of China Ministry of Coal Industry 1997-12-30 Approval 1998-06-01 implementation 1 Scope This standard specifies the requirements for automatic support spray control valve, test methods, inspection rules, signs, packaging, transportation And storage. This standar
Recently learned from Tianjin Petrochemical Company that adjustable dry steam (gas) was completed in cooperation with Tianjin Petrochemical Corporation and China Institute of Metrology The research projects of flow standards and devices have recently been identified by experts organized by Sinope
The choice of soil pH measurement method is a frequently debated issue. In general, one of the following three methods can be selected: Fine Mud pH: Add a sufficient amount of distilled water to the soil sample and stir into a very fine paste. Insert it for 5 minutes. Read after 15 to 2
To calcine and firing the basis of cyanide, sulfur concentrate containing gold fine processing technology for analysis. The process can achieve higher indicators in the case of low investment and operating costs, but this is closely related to air pollution caused by toxic compounds of arsenic and
In the 1990s, lithium titanate appeared as a negative electrode material for new lithium batteries , and it was valued for its excellent performance. In the past decade or so, the research on lithium titanate battery technology at home and abroad has been raging. Animal Feed Pellet MahineThe flat d
[Chinese instrument network instrument research and development] The galaxy is a disk-shaped galaxy. There is a lot of gas and dust on the silver disk, thus forming a spectacular "black nebula" visible to the naked eye. In the direction along the platter (low silver latitude), due to the s
1. As a transport vehicle, a concrete mixer truck must comply with the regulations of the Ministry of Communications of the People's Republic of China on December 13, 1990 for the maintenance and repair, and implement the maintenance and repair system o