ore hearth
A low furnace in which rich lead ore is reduced.
plural of cardioaccelerator
plural of systematism
A binocular telescope used for producing a stereoscopic image of a distant object.
監督者は、鉛分の多い鉱石を還元する低い炉を軽くたたいて、適切な温度に達しているかどうかを確かめた。
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