In addition to comparing the length and index values for equality, you must also check for either a null Number after parsing or an empty input string (" "or length of zero).

除了要比较长度和索引值是否相等之外，还必须检查是解析后的null Number还是一个空的输入字符串(或长度为0)。

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Check the steel rope. If the broken number exceeds 6 within a lay length, a new steel rope will be needed.

检查钢丝绳，若发现钢丝绳在一个搓绕节距长度内折断根数超过6根时，需更换新的钢丝绳。

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