- 相关词组
- mechanical seal with high back pressure高背压式机械密封
- fur seal海狗;海熊;
- mechanical seal with inside mounted spring弹簧内置式机械密封
- company seal公司印章;
- navy seal海豹特遣队;
- air tight seal气密
- mohair coney seal黑色马海毛海狸绒
- metallic-nonmetallic O-ring seal金属-非金属双O型环密封
- bank seal银行印章
- bellows seal波纹管[伸缩鼓]式密封，膜盒[气囊]式密封;
- mechanical seal with low back pressure低背压式机械密封
- mid-separate surface seal中分面密封
- metal O-ring and nonmetallic O-ring seal金属-非金属双O型环密封
- asphalt seal coat地沥青封缝层;
- outer oil seal外轴承油封
- mechanical seal with outside mounted spring弹簧外置式机械密封
- petroleum jelly seal石油胶冻封闭
- harbor sealn.斑海豹;
- mechanical seal with inward leakage内流式机械密封
- elephant sealn.海象，象海豹;
- 今日热词
- 热门搜索
- garbage n.垃圾;废话;垃圾场;
- classmate n.同班同学;
- fly me to the moon [电影]月球大冒险;月球探险记;带我飞向月球;
- photography n.摄影;摄影术;
- cheerful adj.高兴的;令人愉快的;乐观的;
- living adj.活（着）的;在使用中的;生动的;n.生活方式;生计;收入;生者;（尤指旧时）有俸金住房的牧师职位;
- violinist n.小提琴家;小提琴演奏者;
- annual adj.每年的;一年的;[植物]一年生的;n.年刊;一年生植物;
- opposite prep.在…的对面;与…合演;adj.对面的;截然相反的;
- not adv. (否定后面的词或短语，或作否定的回答)不;(构成动词be、do和have及情态动词can或must等的否定形式，常缩略为n't)没有;否，或许不;（拒绝或不允许）不
- stainless adj.不锈的;不会脏的;无污点的;未被玷污的;
- therefore adv.因此;所以;因而
