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GB/T 8151.23-2020
锌精矿化学分析方法 第23部分:汞含量的测定 固体进样直接法
Methods for chemical analysis of zinc concentrates—Part 23: Determination of mercury content—Solid sampling and direct mercury analysis method
GB/Z 39244-2020
Targeted poverty alleviation—Chinese medicinal materials—Specifications for operation management of Gentiana rigescens Franch. ex Hemsl. project
GB/T 17888.3-2020
Safety of machinery—Permanent means of access to machinery—Part 3: Stairs, stepladders and guard-rails
GB/T 39245.1-2020
Grooved metal gaskets with covering layers for pipe flanges—Part 1:PN designated
GB/T 39247-2020
Additive manufacturing—Specification for heat treatment process of metal parts
GB/T 20564.12-2019
Continuously cold rolled high strength steel sheet and strip for automobile—Part 12:Dual phase steel with high formability
GB/T 37309-2019
Anti-corrosion technical specification for marine steel structures by high velocity arc spraying