Meaning of spring frame in English:
spring frame
noun
1The part of a bedstead consisting of a frame in which springs are mounted, used to support the mattress directly.
2A frame of a bicycle or motorcycle in which the rear portion can pivot vertically, forming part of the suspension.
Origin
Early 18th century; earliest use found in Stephen Switzer (bap. 1682, d. 1745), landscape designer and author.
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