HG/T 20645.3-1998 Regulations on Professional Technical Management of Pipeline Machinery for Chemical Plants HG/T20645.3-1998 Stan

HG/T 20645.2-1998 Chemical Plant Pipeline Mechanical Design Engineering Regulations HG/T20645.2-1998 Standard download decompressi

HG/T 20645.1-1998 Chemical plant piping mechanical design content and depth regulations HG/T20645.1-1998 standard download decompr

The displacement range of the variable force spring hanger is 30, 60, 90, 120, 150, 180mm; the load range is 154~217381N. The ambi

This regulation applies to the design of various common equipment foundations in chemical, petrochemical and related devices, excl

HG/T 20642-1998 Technical Specification for Design of Refractory Fiber Lining for Chemical Industrial Furnaces HG/T20642-1998 Stan

HG 2958.1-1988 Determination of strontium and calcium content in celestite ore EDTA volumetric method HG2958.1-1988 standard downl

HG 2957.11-1984 Determination of titanium content in alumite ore Diantipyryl methane photometric method HG2957.11-1984 standard do