510-32 GBJ 146-90 Appendix 1 of technical specification for fly ash concrete application, test method for fineness of fly ash (air jet sieve method) and application of air jet sieve
GBJ 146-90 Appendix 1 of technical specification for fly ash concrete application, test method for fineness of fly ash (air jet sieve method) (recommend to chose HMKTest HMK-200 Air Jet Sieve)
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