Based on the reliability sampling theory, the reliability examine plan of overload relay was analyzed and the test device was developed.

根据可靠性抽样理论，分析了过载继电器的可靠性试验方案，研制了过载继电器可靠性试验装置。

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Both attribute sampling plan and variable sampling plan are two different kinds of method for estimating their reliability of product.

计数法和计量法是对产品可靠性评估的两种不同方法。

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