คำว่า ' spall ' ( VT )

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คำนิยามในภาษาอังกฤษ (definition) :
[n.] The shoulder.
[n.] A chip or fragment, especially a chip of stone as struck off the block by the hammer, having at least one feather-edge.
[v. t.] To break into small pieces, as ore, for the purpose of separating from rock.
[v. t.] To reduce, as irregular blocks of stone, to an approximately level surface by hammering.
[v. i.] To give off spalls, or wedge-shaped chips; -- said of stone, as when badly set, with the weight thrown too much on the outer surface.

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