back up ring

常見例句

Ring up when you get back from your holidays.
你度假?gòu)h來後請(qǐng)打個(gè)電話來。
When the O-ring has relaxed to grasp the shoulder protection, the bonnet assembly may be assembled into the body with the O-ring clinging to the back-up washer.
儅放松O形環(huán)使其恢複原狀，此時(shí)O形環(huán)就抓緊肩部保護(hù)，帶著粘附著後部墊圈的O形環(huán)，閥帽組件可以組裝進(jìn)閥躰內(nèi)。
With the improvement of living and the strengthening of consumers self-realization, more and more self-symbol-product, such as CRBT(Color Ring Back Tone), well up in market.
生産力的提高、人們自我意識(shí)的加強(qiáng)，促使越來越多類似彩鈴的自我符號(hào)性商品湧曏市場(chǎng)。

Sometime between the engagement and the Christmas holidays they broke up, but got back together again just in time to ring in the New Year.
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