为了降低泄漏电流，应当使用高质量的绝缘材料，降低测试环境中的湿度，以及采用保护技术。
To reduce leakage currents, use good quality insulators, reduce the level of humidity in the test environment, and use guarding.
绝缘和保护层材料采用丁聚物，提高电缆柔软特性和防腐、耐寒特性。
Insulation and cover the material are the butyl homopolymers, improve the soft characteristics and anticorrosive, cable hardy properties.
主要利用塑料材料本身的绝缘、密度小、无电磁干扰、耐腐蚀、防水等性能，从而实现其对螺丝的保护作用。
The main use of plastic material itself insulation, small density, no electromagnetic interference, corrosion resistance, waterproof performance, so as to realize its protective effects on screw.
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