
SPECIFICATION FOR STEEL WIRE, COLD-DRAWN, FOR ZIG-ZAG, SQUARE-FORMED, AND SINUOUS-TYPE UPHOLSTERY SPRING UNITS
出版:American Society for Testing and Materials

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SPECIFICATION FOR STEEL WIRE, COLD-DRAWN, FOR ZIG-ZAG, SQUARE-FORMED, AND SINUOUS-TYPE UPHOLSTERY SPRING UNITS
出版:American Society for Testing and Materials
專家解讀視頻