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SY/T 5955-2018 定向井井身轨迹质量 The trajectory quality of directional wells2024-02-24

NF ISO 18522-2017 Paper and board - Automated off-line testing of physical properties for CD (cross direct...2023-10-26

GB/T 1971-2021 旋转电机线端标志与旋转方向 Rotating electrical machines-Terminal markings and direction of r...2023-04-29

GB/T 726-1994往复式内燃机旋转方向、气缸和气缸盖上气门的标志及直列式内燃机右机、左机和发动机方位的定义Recip...2022-06-14

GB/T 17980.127-2004农药田间药效试验准则(二)第127部分;除草剂行间喷雾防治作物田杂草Pesticide-Guidelines for ...2022-06-08

GB/T 1971-2021旋转电机线端标志与旋转方向Rotating electrical machines. Terminal markings and direction of ro...2022-03-18

空中飞行安全的设计2020-10-30

A new technology for coal and gas control based on the in situ stress distribution and the roadway l2020-06-12