单词	Roof coal caving mining
释义	Roof coal caving mining 放顶煤回采
随便看	self-operated level regulator self-operated measuring unit self-operated pressure control valve Self-operated pressure regulating valve self-operated pressure regulator selfoperated regulator self operated regulator self-operated regulator self-operated temperature regulator self operated thermostatic controller self-operated thermostatic controller self-operated thermovalve self-operated valve self-operate logistics self-operating Self Operating Control self-operating control self-operating controller self-operating deposit self-operating export rights self-operating fountains self-operation Self-operational pattern self-operation basis self operation of college