粗-细线拉线机、中拉机
coarse-fine wire drawing machine
单线双线铁路
single and double line railway
机－机双基地雷达
bistatic radar onboard airplane
深拉伸双壁容器
Deep draw double wall containers
双层鼓轮拉线机
twin capstan drawing machine
double block drawing machine
double-capstan wire drawing machine
双层滚筒六头拉线机
double-deck 6 head type machine
双机双桨
double engine and double oar
Double Engines and Propellers
双线双铺施工机具
Equipment for laying tracks parallelly
双线线路切换环
BLSR Bi-directional Line – Switched Ring
BLSR Bi-directional Line C Switched Ring
鲍姆加特射线拉伸法
Baumgarte ray-stretching method
单层滚筒七头拉线机
single deck 7 heads type machine