irregular shape etc的意思|示意
美 / /
英 / /
不规则形状等
irregular shape etc的网络常见释义
采空区塌陷 ...键字：煤矸石处理；采空区塌陷；超前复垦；效益；可行性研究 [gap=577]keyword: coal gangue processing; irregular shape etc; advanced reclamation; benefit; feasibility study ...