支撑用的绝缘体应当用电阻非常高的材料，如聚四氟乙烯或陶瓷来制作。
The support insulators should be made of materials with very high resistance, such as Teflon. or ceramic.
型精密大电流低阻箱采用温度系数低、电阻率大、稳定性高的材料精制而成。
Precise dc low resistance box is formed by material of low temperature coefficient high power resistance and high stability.
型精密大电流低阻箱采用温度系数低、电阻率大、稳定性高的材料精制而成。
Precise DC low resistance Box is formed by material of low temperature coefficient, high power resistance and high stability.
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