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单词 θ216918
释义
society > occupation and work > materials > derived or manufactured material > processed resinous materials > [noun] > pitch > pitch-based materials (2)
smithy-coom1611

soot, ash, and other debris from a smithy; †such material mixed with pitch and used for waterproofing (obsolete).

pitch fibre1946

a black waterproof material, consisting of compressed cellulose or asbestos fibre impregnated under vacuum with pitch, and used for making pipes.

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更新时间:2024/12/22 22:58:38