“bottom tap”的概念、定义、翻译、参考文献-科学参考

单词	bottom tap
释义	bottom tap [`bäd·ǝm ´tap] ^{DESIGN ENGINEERING} A tap with a chamfer 1-1¹/₂ threads in length. ^METALLURGY A hole in the bottom of a furnace for draining out the slag.
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