Unfortunately, when you use the new-style for loop, there's no way to access the actual iterator and hence no way to retrieve the second value of each pair.

不幸的是，在使用新型for循环时，无法访问实际的迭代器，因而无法获取每一对的第二个值。

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Accessories: A pair of rubber loop, a rubber hammer and a pair of spanner.

另外配送橡胶条（橡胶密封圈）一副，橡皮锤一个，扳手一副。

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According to the principle of substitution of the generalized kinematic pair, mobility of the complex loop mechanism composed by multiple sub — chain was studied.

并依据广义运动副替代原则，得到多个子链组合而成的复杂多环路机构的自由度。

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