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- These design features include a phenolic-backed cartridge seat, precision profile disc, onepiece shaft, and four shaft support bearings. 系列21和系列23重型蝶阀适用于当今许多管道系统中条件比较恶劣的、高压使用环境中。
- Four shafts linkage and up and down abnormity section machining. 四轴联动上、下异形面加工;
- The concert took place at the bottom of one of the four shafts of the Statoil Troll A Platform rig in the North Sea. 这座钻台高472米，其中369米位于海平面以下，包括四个竖井。
- It bears a strong resemblance to the other four shafts and can be found in the churchyard of St Edwards church in Leek.Photo by Gary Tacagni. 它和其他四个石柱有着惊人的相似，在里克的圣.;爱德华兹教堂可以看见它。
- According to the effects of spring exerting pressure and cutting high points, this paper studies in depth mechanism of ball superprecision lapping for the four shafts lapping machine, using initiative machining and homigenization error. 根据四轴球体研磨机弹簧加压和高点切削作用 ,运用创成性加工原理和误差均匀化效应对四轴球体研磨机能实现球体超精密研磨的机理作了深入地探讨 ,解释了该机“以粗干精”的特性 ,提出了实现球体超精密研磨的基本工艺方法。
- It is clear to all of us that two plus two is four. 二加二等于四对我们大家都很清楚。
- He wove four plots together into a novel. 他把四条情节编成一部小说。
- We have tea at four o'clock in the afternoon. 我们在下午四点钟喝茶。
- The town boasts four swimming pools. 这座城镇以拥有四个游泳池而自豪。
- Our football team won by four goals to nil. 我们的足球队以四比零取胜。
- He lay back and hit the ball for four. 他向后弯身击中球，得了4分。
- I was clean broke in less than four days. 不到四天我就一个钱也没有了。
- I'll look out for you at about four. 我4点钟左右找你。
- He showed us four case studies of disturbed girls. 他给我们看了4位精神失常姑娘的病历。
- My house is four miles distance from the sea. 我家离海四英里。
- Our team beat them hollow by four clear goals. 我们队以净胜4分彻底击败了他们。
- The leap year comes around once in four years. 每四年有一个闰年。
- The soldiers counted off from the left by four. 士兵们从左起四个一组大声报数。
- He wooed four girls before finally marrying one. 他在结婚之前曾向四个姑娘求过婚。
- Four avenues radiate from the square. 四条林荫大道从那广场向四方延伸。
