Gb T 18941 2003 Translated English Of Chinese Standard Gbt 18941 2003 Gb T18941 2003 Gbt18941 2003

This Standard stipulates the determination methods for the thickness reduction value and the hardness reduction value of flexible cellular materials that are used in interior decoration. This test method provides/ evaluates the means for the functional performance of the latex-type and polymeric acid-type flexible cellular materials for bearing decoration. The measured thickness reduction value and hardness reduction value are related to the possible loss in use; but they are not necessarily the same.

This standard specifies the requirements of the basic dimensions for the general purpose metric screw threads according to GB/T 192-2003 and GB/T 193-2003.

This Standard specifies the square and rectangular keys with width of b=8mm~45mm.

This Standard specifies the method abstract, reagents and materials, instrument and apparatus, test procedures, calculation of results and method precision for the determination of vanadium in coal. This Standard is applicable to lignite, bituminous coal and anthracite.

This Standard specifies the abstract of methods, reagents, instruments and equipment, determination procedure, result expression and precision of determination of phosphorus content in coal. This Standard is applicable to determination of phosphorus content in lignite, bituminous coal, anthracite and coking coal.

This Standard specifies the inspection methods for the colour, appearance, softening point, acid value, unsaponifiable matter, ethanol insoluble matter, and ash of rosin. This Standard is applicable to the inspection of rosin.

This standard specifies three test methods for evaluating the staining of vulcanized rubber or thermoplastic rubber in contact with organic materials: Method A - Contact stain and migration stain; Method B - Extraction stain; Method C - Penetration stain. This standard applies to the evaluation of the grade of staining of vulcanized or thermoplastic rubber in contact with organic materials.

This Standard specifies the determination of total calcium, magnesium and sulphur content in compound fertilizer.