分析比较了预绞丝螺旋线的特点和成型工艺，介绍了绞丝模具结构和型腔加工工艺。
The processes of corresponded moulds are introduced in order to analyze and compare the characteristic and the production process of mould of performed helix.
文章主要对OPGW光缆断股故障提出了修复方案，通过试验论证使用预绞丝修补条进行断股修复的可行性。
This paper presents a kind of repairing scheme for broken-wires fault of OPGW cable, and demonstrates the feasibility of using the repair-strips by experimentation.
文章主要对OPGW光缆断股故障提出了修复方案，通过试验论证使用预绞丝修补条进行断股修复的可行性。
This paper presents a kind of repairing scheme for broken-wires fault of OPGW cable, and demonstrates the feasibility of using the repair-strips by experimentation.
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