A. 冲击钻进 B. 冲抓钻进 C. 正循环回转钻进 D. 反循环回转钻进 E. 旋挖钻进
A. was playing B. am playing C. play D. played
A. 沥青混合料搅拌设备 B. 沥青运输车 C. 转运设备 D. 沥青摊铺机 E. 拖拉机