air-harden
chiefly Metallurgy
verb
1 [with object] To harden (especially steel) by allowing it to cool or stand in air.
2 [no object] To harden through exposure to air.
Origin
1930s; earliest use found in Engineering.
| 单词 | air-harden |
| 释义 | air-hardenchiefly Metallurgy verb 1 [with object] To harden (especially steel) by allowing it to cool or stand in air. 2 [no object] To harden through exposure to air. Origin |
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