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ASTM-D-792比重測試
Changes in density of a single specimen may be due to
changes in crystallinity, loss of plasticizer, absorption of
solvent, or to other causes. Portions of a sample may differ in
density because of difference in crystallinity, thermal history,
porosity, and composition (types or proportions of resin,
plasticizer, pigment, or filler).
關鍵詞:ASTM-D-792比重測試
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