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