关于“铸造高温合金显微疏松评定方法”和“铸造高温合金晶粒度评定方法”两项航标的说明
Explanation for Aeronautical Standards of "Test Methods for Estimating Grain Size of Superalloy Investment Castings" and "Test Methods for Estimating Microshrinkage of Superalloy Investment Castings"
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