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由真北逆时针度量到物标方位线,度量范围 000o~360o 由真北顺时针度量到物标方位线,度量范围 000o~360o 由陀螺北逆时针度量到物标方位线,度量范围 000o~360o 由陀螺北顺时针度量到物标方位线,度量范围 000o~360o"
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由真北逆时针度量到物标方位线,度量范围000o~360o 由真北顺时针度量到物标方位线,度量范围000o~360o 由陀螺北逆时针度量到物标方位线,度量范围000o~360o 由陀螺北顺时针度量到物标方位线,度量范围000o~360o
由真北逆时针度量到物标方位线,度量范围 000o~360o 由真北顺时针度量到物标方位线,度量范围 000o~360o 由陀螺北逆时针度量到物标方位线,度量范围 000o~360o 由陀螺北顺时针度量到物标方位线,度量范围 000o~360o"
They occur at about 4,000 metres below ground level. The injection of water into earthquake faults prevents earthquakes from occurring. They are usually caused by the oil in the faults. Harmful earthquakes earl be possibly prevented by causing small, harmless earthquakes.
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由真北逆时针度量到航向线,度量范围 000o~ 360o 由真北顺时针度量到航向线,度量范围 000o~360o 由陀螺北逆时针度量到航向线,度量范围 000o~ 360o 由陀螺北顺时针度量到航向线,度量范围 000o~360o"
They occur at about 4,000 meters below ground level. The injection of water into earthquake faults prevents earthquakes from occurring. They are usually caused by the oil in the faults. Harmful earthquakes can be possibly prevented by causing small, harmless earthquakes.
第2版第1次印刷,印数1—8 000册 第2版第1次印刷,印数50 001—58 000册 第2版第3次印刷,印数50 001 58 000册 第2版第4次印刷,印数50 001—58 000册
由真北逆时针度量到航向线,度量范围 000o~ 360o 由真北顺时针度量到航向线,度量范围 000o~360o 由陀螺北逆时针度量到航向线,度量范围 000o~ 360o 由陀螺北顺时针度量到航向线,度量范围 000o~360o"