| 单词 | roll mark |
| 释义 | > as lemmasroll mark roll mark n. Metallurgy a mark produced on sheet metal as a result of rolling with an imperfect set of rollers. ΘΚΠ society > occupation and work > materials > derived or manufactured material > metal > qualities of metals > [noun] > imperfections honeycomb1530 roll mark1894 hair crack1896 season crack1909 season cracking1910 snowflake1919 hairline crack1923 shrinkage cavity1923 clink1925 shatter crack1930 stretcher strain1931 pimpling1940 stringer1942 quench cracking1949 1894 Amer. Engineer & Railroad Jrnl. Jan. 12/1 Both sides to be perfectly clean and free from pitting, roll marks, scale, dirt, overlapping, or other defects. 1962 G. R. Bashforth Manuf. Iron & Steel (ed. 2) IV. iv. 138 Sections are liable to develop certain defects, such as..‘roll marks’ due to defective or badly worn rolls. 2003 K. G. Swift & J. D. Booker Process Select. (ed. 2) 97 Surface defects may result from inclusions and impurities in the material (scale, rust, dirt, roll marks, and other causes related to prior treatment of ingots). < as lemmas |
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