然而从封四开始，国甲的封闭系列也有从里面盖盖子了。
However, starting from the Alpha IV-SV there are also caps in the insides, too.
本型泵是单壳体节段式多级离心泵，主要由定子、转子、轴承和轴封四大部分组成。
Type DG pump is single casing segmental multi-stage centrifugal pump, the main parts of it are stator, rotor, bearing and shaft seal.
分析了烧结机头尾密封四连杆密封装置存在的缺陷，介绍了全金属柔磁密封的结构和特点。
The paper analyzes the faults of four-link sealing device and introduces the structure and characteristics of all-metal flexible magnetic sealing.
最后，在她勉强订下的婚期前的那个礼拜里，她下决心写了一封四页长的自白信，慌慌张张地塞进他的门下。
Finally, within a week of the wedding-day which she had reluctantly set, her resolution takes shape in writing — a four-page confession is breathlessly thrust under his door.
最后，在她勉强订下的婚期前的那个礼拜里，她下决心写了一封四页长的自白信，慌慌张张地塞进他的门下。
Finally, within a week of the wedding-day which she had reluctantly set, her resolution takes shape in writing — a four-page confession is breathlessly thrust under his door.
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