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4 实用新型专利申请公告之二分类号公开号名称 E21D15/51 2078803U 多功能数显测压枪 E21D15/51 2078804U 液压支架初撑力保证阀 E21D15/58 2078805U 架棚机 E21D17/10 2078806U 插入式金属背板 E21D17/10 2079217U 玻璃钢背板 E21D23/06 2080102U 工字钢顶梁托梁器 E21D17/10 2080559U U型钢巷道支架卡缆 E21D19/00 2080560U 侧边带有双排联网钩的菱形金属网 E21D17/02 2080988U 前探梁固定器 E21D21/00 2081884U 改进型杆体可拉伸锚杆 E21D15/51 2082761U 液压支柱工作阻力监测仪 E21D15/44 2083194U 内循环外加载单体液压支柱装置 E2tD17/00 2083194U 采矿用新型铰接顶梁
4 Utility Model Patent Application Announcement No. 2 Publication Number Name of Publication E21D15 / 51 2078803U Multi-function Digital Display Pressure-Measuring Gun E21D15 / 51 2078804U Hydraulic Support Initial Support Force Guarantee Valve E21D15 / 58 2078805U Rack Mount Machine E21D17 / 10 2078806U Plug- Plate E21D17 / 10 2079217U FRP back plate E21D23 / 06 2080102U I-beam roof beam joist E21D17 / 10 2080559U U-section steel roadway bracket cable E21D19 / 00 2080560U Side rhombic metal mesh with double row network hooks E21D17 / 02 2080988U Front Beam Holder E21D21 / 00 2081884U Improved Rod Body Extensible Bolt E21D15 / 51 2082761U Hydraulic Support Working Resistance Monitor E21D15 / 44 2083194U Internal Circulation External Loading Hydraulic Support Unit E2tD17 / 00 2083194U New Hinged Roof Beam for Mining