上海钻具Certificate 5CT-0894.pdf > |
上海钻具Certificate 5DP-0056.pdf > |
上海钻具Certificate 7-1-0591qxnc.pdf > |
0045 - 2017-314-Shanghai Hilong - Facility Level 5.pdf > |
0134 - 2017-314-Shanghai Hilong - Facility Level 5.pdf > |
0194 - 2017-314-ShanghaiHilong Process Level 3.pdf > |
0197 - 2017-314-ShanghaiHilong Process Level 2.pdf > |
010一种反向成型缩径转移钻杆管端加厚方法__发明(1).pdf > |
一种高抗T双台肩钻具螺纹连接机构.pdf > |
耐用型超高抗T强度钻杆接头.pdf > |
一种超高加厚 钻杆加工方法.pdf > |
