doublenessn.二倍诡计doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double-bank commutator switch双触排转换开关doubler type magnetic amplifier双式磁放大器double pass dye laser amplifier双程平面染料激光放大器double-flow sealing structure双流环密封double hull shipboard structure双层舷侧结构Double fast sand casting cement双快型砂水泥double-block ballastlss track双块式无砟轨道double-front-page and index双头版与索引double liability of shareholder股东的加倍责任double reduction geared turbine两级减速船用汽轮机