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伸长比
bridg.constr.	elongation ratio
el.	coefficient of extension; percentage elongation
el.mach.	expansion ratio
plast.	extension ratioprolamin; ratio of elongation
space	extension ratio
tech.	elongation ratio (值); ratio of elongation (值)

伸长比: 6 phrases in 3 subjects

Economy	1
Oil / petroleum	1
Technology	4