GB/T 41163-2021煤礦井下煤層水射流沖擊增透工藝設計規范Specification for process design of enhancing coal seam permeability by water jet in coalmine

上一條：GB/T 3670-2021銅及銅合金焊條Covered electrodes for manual metal arc welding of copper and copper alloys

下一條：GB/T 41176-2021專(zhuān)業(yè)運動(dòng)服裝 滑雪服Professional sportswear—Ski and snowboard wear

版權：如無(wú)特殊注明，文章轉載自網(wǎng)絡(luò )，侵權請聯(lián)系cnmhg168#163.com刪除！文件均為網(wǎng)友上傳，僅供研究和學(xué)習使用，務(wù)必24小時(shí)內刪除。