roof bolting वाक्य
"roof bolting" हिंदी में roof bolting in a sentenceउदाहरण वाक्य
- Roof bolt plates for mining and tunnel support
- Research and development of new drilling bit for roof bolt driller
- Galvanized mild steel roofing bolt and nut
- Technique of combined supporting of roof bolting with bar and wire mesh in coal roadway
- Expansion type roof bolt
- Application of the technology of roof bolting with bar and wire mesh in the zhangji coal mine
- Based on the rock pressure ' s characteristics of the pre - driven roadway , the rational support plan and parameters about roof bolting with bar and wire mesh are determined , and the manner of driven waste in place of coal was adopted
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