I'd had enough. We had an out-of-town trip planned, and if the plow-which was sure to show up any minute now-couldn't reach the point where our car was parked, we'd have to bag it.

受够了，本来我们计划到镇外面玩去，如果那辆现在随时都有可能出现的除雪车不能抵达我们停车的地方，我们将不得不把车子包复上。

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Through the assumed moving direction of the plow chain, the maximum pull point is determined, the tensile strength of the plow chain is checked, the safe coefficient of the plow chain is obtained.

通过假定刨链的运行方向，确定刨链的最大拉力点，以校核刨链的抗拉强度，得出刨链的安全系数。

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