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1814 6-ft. Metal Helical Spring
Longer and heavier, the spring demonstrates the effects of greater mass and of greater tension.
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118 Daliang Street Ningbo, China
Post Code 315 000
Tel: 86-574-8732 1938
Fax: 86-574-8732 1940
sales@superascientific.com
http://www.superascientific.com
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