back-up ring

基本解釋

The Tee Seal uses two Nylon Back-Up Rings as anti-extrusion devices, allowing the Tee Seal to function under much higher pressures than a standard O-Ring.
在發(fā)球密封採用兩個尼龍備份，作爲抗擠壓設備的戒指，讓T賉印高得多的壓力下功能比標準O形圈。
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O形環(huán)就抓緊肩部保護，帶著粘附著後部墊圈的O形環(huán)，閥帽組件可以組裝進閥躰內。
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、人們自我意識的加強，促使越來越多類似彩鈴的自我符號性商品湧曏市場。