circumferential expansion周: circumference; periphery; ci ...向: direction伸长: prolongation; extension; elo ...单向伸长: unidirectional elongation横向伸长计: lateral extensometer; lateralextensometer下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:周向伸长，即可在微信中查询翻译
