Read Edit View history 備用環 bèiyònghuán backup ring Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 备用环/ 備用環 bèiyònghuán backup ring a mechanical ring used as a spare or to provide extra support for a seal Edit Delete References Add reference No references for this word.
备用环/ 備用環 bèiyònghuán backup ring a mechanical ring used as a spare or to provide extra support for a seal Edit Delete