methane drainage वाक्य
"methane drainage" हिंदी में methane drainage in a sentenceउदाहरण वाक्य
- A gassy pit with a methane drainage system, but important producer of coking coal for the iron and steel industry, particularly Ravenscraig.
- Proposed uses for the device included drilling shallow holes for mineral exploration, construction, underground gasification of coal, water and methane drainage.