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- lead seal band 铅封圈
- The circlip lead seal packer with sand control is developed for ensuring the normal production of big borehole sand control well. 为保证大井眼防砂井正常生产,研制了卡簧式铅封防砂封隔器。
- lead seal single slip liner hanger 铅封单卡瓦衬管悬挂器
- Keywords big borehole;circlip lead seal packer;development;test; 大井眼;卡簧式铅封封隔器;研制;试验;
- There are fulse, kilowatt-hour meter,air switch and other elements,there are lead sealing holes on each metering space doors so as to provide sealing electric. 箱内装有熔断器、电度表、空气开关等元件，计量室门上均有铅封孔，能有效防止窃电。
- The horse forged ahead the lead in the homestretch. 那匹马在最后阶段突然加速跑到前面。
- Shirley will try out for the lead in the play. 雪莉将参加该剧主角的选拔演出。
- Excessive patriotism can lead to xenophobia. 爱国主义过了头即可导致仇视一切外国人。
- Lead aprons shield people from radiation. 铅做的工作裙可使人免进辐射。
- Graphite is used in making lead pencils. 石墨常被用来做成铅笔。
- Lead will fuse at quite a low temperature. 铅会在相当低的温度下熔化。
- The team recovered its lead in the second half. 该队在下半场重新领先。
- No road of flowers lead to glory. 没有一条通往光荣的道路是铺满鲜花的。
- Copper has less resistance than lead. 铜的电阻比铅的小。
- I'll take part, but I won't want to lead. 我参加，但不想当领导。
- Alice has the lead in the school play. 艾丽斯在学校演出的戏剧中担任主角。
- We need someone with real vision to lead the party. 我们需要具有真知灼见的人来领导这个党。
- I don't want to lead an inactive life. 我不想过沉闷的生活。
- Where are the dog's collar and lead? 狗的颈圈和皮带哪去了？
- A white lead pigment, sometimes used in cosmetics. 铅白一种白色铅颜料，有时用于化妆品制造
