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单词 regulus metal
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regulus metal
regulus metal n. Metallurgy an alloy of lead and antimony which contains at least 75 per cent lead.
ΚΠ
1879 G. Lunge Theoret. & Pract. Treat. Manuf. Sulphuric Acid I. 297 It carries in its bottom a valve-seat a of regulus metal, into which fits a conical plug.
1938 R. Hum Chem. for Engin. Students xviii. 484 The product, called regulus metal, has the great advantage, compared with lead, of being hard, and able to withstand considerable mechanical strain.
2002 G. S. Brady et al. Materials Handbk. ii. 528 The alloy is also known as hard lead, and in England it is called regulus metal.
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