一次采全高 meaning in Chinese

full-seam mining

Discussion on coal mining rate of full - dimenssion cutting and top coal caving technology
一次采全高和放顶煤工艺采出率问题分析
Practice on fully mechanized top coal caving and one pass cutting in lignite seam with soft roof
软岩褐煤综采低位放顶煤一次采全高的实践
Digging overall height floor coal at one times at about 3 . 0m seam face with single hydraulic prop
左右煤层采用单体液压支柱支护卧底煤一次采全高
Prevention and control of spontaneous combustion in gob of thicker seam by fully mechanized mining
浅谈较厚煤层一次采全高综采工作面采空区自然发火的防治
Discussion on the application of 3 . 5 m single hydraulic prop mining all height at one times in slope long wall mining
单体液压支柱一次采全高在倾斜长壁开采中的应用