doublelockvt.给 ... 上双锁(特别谨慎地上锁)doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double-headed spike双头钉double twilled merino复式斜纹美利奴毛织物double housing planer双柱龙门刨床double-headed arrow双头指针double-melted ingot双熔锭Double-cavity stoma双腔造口double barrelled name双姓double pin sucker rod两头阳螺纹的抽油杆double-flow turbine双流涡轮机,双流式汽轮机,双流式涡轮机,双流式涡轮double-wire circuit双线电路, 双线回路