telegraph posts of metal
... 溜冰场（金属结构） skating rinks 金属电线杆 telegraph posts of metal 可移动的金属温室 gueenhouses of metal,transportable ...
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非金属电线杆 non-metallic utility poles
电线金属杆 wire metal pole
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可以通过加宽导线和地线的间距来减少危险性、将电线和金属元件绝缘和将电线移动到离电线杆顶部较远的地方。
Power lines can be made less dangerous by widening the gap between conducting and ground wires, insulating wires and metal parts, and moving wires farther away from pole tops.
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