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来源：雅诚德英语网
And the formulas for the length and working forces of the drive belt have been given.
并且给出了成型皮带长度和皮带拉力的计算公式。
And the formulas for the length and working forces of the drive belt have been given.
并且给出了成型皮带长度和皮带拉力的计算公式。