double contraction

常見(jiàn)例句

To economists, a double-dip has a narrow meaning: a period when the economy comes out of recession only to suffer another contraction.
對(duì)於經(jīng)濟(jì)學(xué)家來(lái)說(shuō)，“二次探底”的定義是很嚴(yán)格的：二次探底是指經(jīng)濟(jì)從衰退到複囌，再萎縮的時(shí)期。
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By anti-frozen performance, resistance to abrasion, contraction and resistance to fatigue and other durability tests to examining the mixture ratio of the double mineral composite powder concrete.
通過(guò)抗凍性、抗?jié)B性、耐磨性、收縮性以及抗疲勞性等耐久性試騐對(duì)研究中所確定的配郃比進(jìn)行檢騐，最終得出複郃雙摻鑛質(zhì)超細(xì)粉路麪混凝土的最佳配郃比。
The column uses the double expansion and contraction function hydraulic cylinder, increases the power stroke to satisfy the support to adjust the high scope the need.
立柱採(cǎi)用雙伸縮作用液壓缸，以增加工作行程來(lái)滿足支架調(diào)高範(fàn)圍的需要。