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单词 pinholing
释义 ˈpinholing, vbl. n.
[f. pin-hole + -ing1.]
The presence or production of pin-holes.
1925Jrnl. Inst. Metals. XXXIII. 228 These facts..led to the conclusion that the cause of ‘pinholing’ [in castings] is occluded gas.1941Light Metals IV. 133/1 The foundry⁓man..has to produce castings free from serious pinholing.1947J. C. Rich Materials & Methods Sculpture ii. 51 Pinholing is frequently caused by firing the ceramic body and the glaze at the same time, although air that has been incorporated in the clay mass, dirt, and quick kiln cooling may also cause pinholing.
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