NB/T 10518-2021
DeterMination of seventeen oxygen compounds in methanol-to-olefin (MTO) water by gas chromatography 甲醇制烯烃(MTO)水中十七种氧化合物的测定 气相色谱法 |
NB/T 10523.1-2021
Test Methods for mechanical properties of drum shearers - Part 1: Laboratory tests 滚筒采煤机力学性能测试方法 第 1 部分:实验室试验 |
NB/T 10543-2021
TYBP series Mine flameproof permanent magnet synchronous variable frequency motor (frame size 355~450) TYBP系列矿用隔爆型永磁同步变频电动机(机座号355~450) |
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