Nid oes gennych resi chwilio datblygedig. Ychwanegwch un trwy glicio ar y botwm '+ Ychwanegu Rhes'
Digitized image of a drawing showing of coarse metal melting furnace, as published fig 618 from Tomlinson's 'Cyclopedia of Useful Arts, Manufacturing, Mining and Engineering' Vol I, 1854.Further Information
NPRNTeitlMath O SafleCasgliadauDelweddau
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