Standard and/or project under the direct responsibility of ISO/TC 263 Secretariat	Stage	ICS
ISO/CD 4657 Assessment specifications of coalbed methane resources	30.20
ISO 18871:2015 Method of determining coalbed methane content	90.20	73.020
ISO 18875:2015 Coalbed methane exploration and development — Terms and definitions	60.60	73.020 01.040.73
ISO/CD 23604 Method of determining specific surface area of coal	30.98
ISO/CD 23604 Method of determining specific surface area of coal	30.20

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