?双滚筒绞车

... double-drum tilt rig 双滚筒倾斜钻机 double-drum winch 双滚筒绞车 double-duty regulator 双作用调节器 ...

?双筒绞盘机

... 双筒绞盘机 double-drum winch; 双筒井 double-bore well; 双筒立体显微镜 orthostereoscope; ...

?双卷筒起网机

... double-dovetail key ==> 双鸠尾榫键 double-drum winch ==> 双滚筒绞车,双卷筒起网机 double-ended boiler ==> 双炉门式锅炉,双头锅炉 ...

?双卷筒绞车

... double-drum boiler 双锅筒锅炉 double-drum winch 双卷筒绞车 double-element wattmeter 二元瓦特表 ...