最終更新日：2025/11/29
The metallurgist demonstrated Pattinson's process to the students, repeatedly melting and skimming the argentiferous lead until the silver was concentrated.
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The metallurgist demonstrated Pattinson's process to the students, repeatedly melting and skimming the argentiferous lead until the silver was concentrated.
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元となった例文
冶金技師は、銀含有鉛を繰り返し溶かしてすくい取ることで銀を濃縮する脱銀法を学生たちに実演した。
