Is the double bottom block built on pin jigs?
双层底分段是在胎架上造的吗？
He suggested that a double railway tunnel should be built.
他提议建一条双轨隧道。
He suggested that a double railway - tunnel should be built.
他提议建一条双轨隧道。
Beidou double-star positioning system is built up by our country.
北斗双星定位系统(简称双星定位)是我国自行建立的一种定位系统。
He suggested that a double railway-tunnel should be built.
他提议建一条双轨隧道。
It is of built-in type, double seal face, multi-spring, unbalanced type and drive sleeve transmission.
内装式、双端面、多弹簧、非平衡型、传动套传动。
It is of built-in type, double seal face, multi-spring, unbalanced type and drive sleeve transmission.
内装式、双端面、多弹簧、非平衡型、传动套传动。
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