Construction equipment in place: excavator, crane, welding machine, Angle grinder, abrasive cut-off machine and any other equipment.

施工机具到位：挖掘机、吊车、焊机、角向磨光机、砂轮切割机及其它工用具。

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This paper assumes the rotational angular velocity of a crane according to the experimental sine rule, and derives the nonlinear differential equations of the swing Angle.

本文以实验为依据，假定起重机的旋转角速度按正弦规律变化，推出货重偏摆角的非线性微分方程。

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Because the diagonal outriggers brace the crane not only against side-to-side forces, but also front-to-back turning forces, these two cranes can lift the full rated load over a wider Angle.

由于对角舷外架不仅支撑起重机抵抗侧向力，而且也包括交变的前后力，这两台起重机可以在一个更宽的角幅度之上举起额定的负荷。

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