双轮式车床 double wheel lathe

双滚轮式导览钳 double roller chock

双顶置式凸轮轴 DOHC ; Double Overhead Cam

双击式水轮机 [动力] cross-flow turbine ; flow turbine

双流式涡轮机 compound flow turbine ; dual-flow turbine ; twin turbine

双串式轮 twin-tandem wheel

双轮环式滑车 double wheel pulley

双滚轮式 twin roller type

双动式汽轮机 double motion turbine

双轴式轮碾机 multi-mull mixer