GaAs 的压力 - 电阻曲线 ， (c) 6.0 mm 切角二级压砧校压结果 ， (d) 2.5 mm 切角二级压砧校压结果 Fig.3 Pressure calibration of 1 000 t Walker-type apparatus: (a) ZnTe resistivity-pressure curve using 6.0 mm edge lengthsecond stage anvil; (b) GaAs resistivity-pressure curve using 2.5 mm edge length second stage anvil; (c) pressure calibration result using 6.0 mm edge length second stage anvil; (d) pressure calibration result using 2.5 mm edge length second stage anvil