设定指令指标，指向机器码中所指定的位移位置。

Sets the instruction pointer to the specified offset location in native code.

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取得值，指出将指令指标设定为机器码中指定的位移位置是否安全。

Gets a value that indicates whether it is safe to set the instruction pointer to the specified offset location in native code.

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冻土帷幕最大水平位移位置均出现在开挖面以下，一般出现在帷幕全深的0.7-0.8倍深度范围内；

The maximum horizontal displacement occurs below the excavated surface with the depth of 0.7~0.8 times of the pit depth.

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