high gassy seam
英
美
- 高瓦斯煤层
相关词汇
high flux
high
high-temperature air combustion
high pressure water-jet cleaner
high-speed railway power system
High-Density Helicopter Landing
high level professional education
High Altitude Anticraft Artillery
High-Altitude Navigation System
high- power semiconductor laser
high-altitude tracking platform
High walls surround the prison.
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