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1·Upper section composed of driving sprocket upper casing with rails (double chain) and discharging outlet.

上部区段，由传动链轮及带有轨道(双排链)的上部机壳、卸料口组成。

2·Upper device — includes parts of upper casing, top cover, discharge outlet (with anti back feed plate), head shaft and backstop.

上部装置——有上部机壳、上罩、卸料口(装有防回料板)、头轴装配、逆止器等部件。

3·Applying pump pressure then activates a sliding collar that opens access ports, enabling circulation across the upper casing interval.

然后施加泵压，使滑动箍启动，于是使进入口开启，从而能够穿过套管上段进行循环。

4·Upper casing, as a key part in the driving system of helicopter, is difficult to be formed owing to its complex geometry and high demand for property.

上机匣为直升机传动系统中的关键零件，几何形状复杂，性能指标要求高，成形难度大。

5·End face with a gap, no boss butt is refers to the upper and lower casing left a certain gap between the upper and lower main chord rod end face at the same time contact.

端面有间隙、无凸台对接是指在上、下套管之间留有一定间隙，上、下主弦杆端面同时接触对接。

6·Its upper end is drill pipe box or union, the nether end is casing pin. It is a crossover with hollow inside.

它是个上端为钻杆母扣或者由壬，下端为套管公扣，内空心的转换接头。

7·The casing hanger provides a means of ensuring that the string is correctly located and generally incorporates a sealing device or system to isolate the casing annulus from upper wellhead components.

套管悬挂器可确保套管柱被正确地放置，它一般包括一个密封装置，以便将套管环形空间与上部的井口部件隔离。

8·The heat conducting plate has a hollow casing body whose upper and lower wall surfaces are respectively opened with continuous grooves.

所述导热板有一中空壳体，在该壳体的上、下壁面分别开设有连续沟槽。

9·NE series plate chain bucket elevator is composed of upper section middle casing lower section moving members driving unit maintenance platform and hanging racks.

提升机由上部区段、中部机壳、下部区段、运行部件、驱动装置、检修平台和吊架组成。

10·The casing bowl incorporates features to secure and seal the upper end of the casing string and frequently provides a port to enable communication with the annulus.

套管头四通包括固定和密封套管柱上端的部件，并经常提供一个用于与环形空间连通的开口。