对刮痕强度试验机进行适当的改进，就可测量芯砂的冲击韧性，并使一机两用。
The scratch strength tester has been improved in the paper, which can measure the impact toughness and has two uses.
对刮痕强度试验机进行适当的改进，就可测量芯砂的冲击韧性，并使一机两用。
The scratch strength tester has been improved in the paper, which can measure the impact toughness and has two uses.
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