FADE
发表于 2025-3-25 04:46:35
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Etymology
发表于 2025-3-25 09:17:32
Metals and Their Conservation,ia and Mesopotamia. According to the Old Testament, Tubal-Cain, an early descendant of Cain, was the master of all coppersmiths and blacksmiths (Genesis 4:22). It seems probable that relatively pure copper (native) was first used, then bronze (an alloy with tin) and later brass (an alloy with zinc).
harrow
发表于 2025-3-25 12:36:28
Paintings on Canvas, of the greatest of mistaken endeavours have arisen in this area — for example, by the application of too rigorous and sometimes inadequate cleaning regimens, combined with unsuitable methods of support for the canvas and the use of unsatisfactory varnishes.
hermitage
发表于 2025-3-25 16:23:51
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Galactogogue
发表于 2025-3-25 22:41:53
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GLUT
发表于 2025-3-26 01:46:24
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eucalyptus
发表于 2025-3-26 04:19:47
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浅滩
发表于 2025-3-26 10:25:00
Dating Techniques,, is of value. This is primarily of value in establishing the authenticity of disputed objects, whether of stone, metal or organic materials such as leather, wood and textiles (for example, the Turin Shroud).
APO
发表于 2025-3-26 16:41:49
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填料
发表于 2025-3-26 18:57:25
Revisiting the Productivity Debate,er — have been the most widely used. They are easily destroyed by fire or water and are readily attacked by moulds, fungi and insects. However, in dry conditions they have shown remarkable powers of survival.