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SY/T 5955-2018 定向井井身軌跡質(zhì)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 旋轉電機線(xiàn)端標志與旋轉方向 Rotating electrical machines-Terminal markings and direction of r...2023-04-29

GB/T 726-1994往復式內燃機旋轉方向、氣缸和氣缸蓋上氣門(mén)的標志及直列式內燃機右機、左機和發(fā)動(dòng)機方位的定義Recip...2022-06-14

GB/T 17980.127-2004農藥田間藥效試驗準則(二)第127部分;除草劑行間噴霧防治作物田雜草Pesticide-Guidelines for ...2022-06-08

GB/T 1971-2021旋轉電機線(xiàn)端標志與旋轉方向Rotating electrical machines. Terminal markings and direction of ro...2022-03-18

空中飛行安全的設計2020-10-30

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

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