There is hand winch in the back of speaker truss , Line speaker can easily be hanging .
喇叭架背部配有手摇器，可以轻松将线阵音响吊上空中。
The parameters of suspension roof support were determined based on hanging action with a bolt-wire or cable truss.
应用锚杆兜吊和锚索悬吊两种作用设计了锚杆支护参数。
The parameters of suspension roof support were determined based on hanging action with a bolt-wire or cable truss.
应用锚杆兜吊和锚索悬吊两种作用设计了锚杆支护参数。
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