文件:Lodestone attracting nails.png

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Cī-siŏh-bĭh ùng-giông téng Wikimedia Commons lì, bĕng-chiā ô kō̤-nèng ké̤ṳk gì-tă cuŏng-áng sāi. Â-dā̤ sê cī-bĭh ùng-giông găk ùng-giông mièu-sŭk hiĕk-miêng gì mièu-sŭk nô̤i-ṳ̀ng.

總結

Mièu-sŭk
English: A lodestone, a piece of the mineral magnetite that is a natural magnet, from 1921 electrical engineering book. The caption of the picture said: "Natural magnet attracting iron nails".
Nĭk-gĭ
Lài-nguòng Downloaded 2008-11-04 from Fred Anzley Annet (1921) Electrical Machinery: A practical study course on installation, operation, and maintenance, 1st Ed., McGraw-Hill, New York, p.11, fig.3 on Google Books
Cáuk-ciā Fred Anzley Annet
Sêu-guòng hṳ̄-kō̤
(Bô siŏh-huòi sāi ciā ùng-giông)
Public Domain in USA - published in USA prior to 1923

版權說明

Public domain
Public domain
這一媒體文件在美國屬於公有領域。這可用於版權過期的美國作品,通常這些作品發表於1929年1月1日之前。查看這個頁面可以獲取到更多的解釋。

United States
United States
這一圖片在美國以外可以沒有處於公有領域,特別是對美國作品不適用較短期限法則的國家,如加拿大、中國大陸(不含香港及澳門)、德國、墨西哥和瑞士。作品的作者和發表時間是關鍵信息,並且必須提供。參見 維基百科:公有領域維基百科:版權信息以獲取更多細節。

說明

添加單行說明來描述出檔案所代表的內容
Lodestone, a natural magnet 🧲

在此檔案描寫的項目

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hiêng-káik-sì2021 nièng 5 nguŏk 3 hô̤ (B1) 14:432021 nièng 5 nguŏk 3 hô̤ (B1) 14:43 bēng-buōng gì sáuk-liŏk-dù532 × 668(181 KB)MaterialscientistFFT
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