因此，对盘形悬式绝缘子直流覆冰试验方法进行研究，对直流覆冰输电线路外绝缘特性的研究具有重大的意义。
Therefore, it has great significance to research DC icing test methods on disk-shaped suspension insulator for study of DC transmission line characteristics of external insulation.
盘型悬式绝缘子自动胶装机的设计包括机械系统设计和气压传动控制设计。
The design of automatic cementing device for cap and pin insulator consists of mechanical system and pneumatic driving control.
如果需要使用的导线长度超过25毫米，或者使用裸导线会造成焊盘与零件脚之间短路，这些情况下必须使用有绝缘皮的导线。
How to translate this sentence?Wire is insulated if greater than 25 mm in length or is liable to short between lands or component leads.
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