seam top
英
美
- 煤层的顶板
seam top的相关资料：
临近单词
seamy
seam
seam-free nylon stockings
seam with potential outburst
seams with a closed distance
seam permeability coefficient
Seamen' s qualification exams
seam roof and floor fracturing
seam automatic tracking system
seam with shallow mining depth
seam with low depth overburden
seam roadways bolt-mesh-anchor
