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BS 1428-B3:1964

Microchemical apparatus. Apparatus for the determination of elements by other than combustion methods.-Specification for nitrogen determination apparatus (non-transference micro-Kjeldahl)
standard by BSI Group, 06/15/1964

BS 1428-I1:1963

Microchemical apparatus. Combustion accessories-Specification for combustion boats and sheath for microchemical analysis
standard by BSI Group, 11/08/1963

BS 1902-4-4.1:1984

Methods of testing refractory materials. Properties measured under an applied stress-Determination of the cold crushing strength of shaped insulating refractory products (method 1902-401)
standard by BSI Group, 05/31/1984