The LR series is completed by the hydraulic duty cycle crawler cranes range (HS series), which is similar to the LR series in design.
LR系列还补充有结构类似于LR系列的液压负载循环履带式起重机系列（HS系列）。
The series of electric control devices developed in 70s for overhead travelling and gantry cranes has several shortcomings.
70年代我国统一设计的桥式、门式起重机系列电控设备存在不少缺点。
Port type - loading and unloading cranes net, cargo cover networks, group network, harness the network series.
港口类-装卸吊网、货物罩网、成组网络、吊带网络系列。
It provides a series of advantages for use as a safety device of boom type cranes.
它作为臂架型起重机械的安全保护装置具有一系列优点。
It provides a series of advantages for use as a safety device of boom type cranes.
它作为臂架型起重机械的安全保护装置具有一系列优点。
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