The compounds have the connecting ring structures of piperazine or piperidine, have notable antitumor activity, and provide a new choice for preparing antitumor drugs in clinical practice.
该类化合于具有哌嗪或哌啶的连接环结构，且具有显著的抗肿瘤活性，为临床上制备抗肿瘤药物提供了新的选择。
The ring road connecting the main cities, the symbol of reconstruction, became perilous.
联系各主要城市的环城公路是重建的象征，也变得岌岌可危。
Generally, do not remove components (including valve, connector, rubber, plastic ring and copper cap) before the tubing for connecting indoor, outdoor units are prepared.
一般地，如果没有准备好连接室内、外机组的配管，请勿拆卸部件(阀门、接头、橡胶、塑料圈及铜帽等元件)。
The probe puncture guiding device comprises a support, a cylinder, a lantern ring, two connecting rods and two clips.
所述探头穿刺引导仪包括一支架、一柱体、一套环、两个连接杆以及两个夹子。
The connecting rods between the guide vane servomotor piston rods and guide vane operating ring shall be of steel, with grease lubricated bearings.
导叶操作圆环将被设计接受导叶辅助电动机连接杆和别针在圆环的相反点。
The invention discloses a connecting mechanism of sealed insulation pipelines, comprising a straight-through joint, an insulation cap, a spherical joint, an insulation sleeve ring and a cap nut.
本发明公开了一种密封绝缘管路连接机构，包括直通接头、绝缘帽、球型接头、绝缘套环和外套螺母。
By means of elastic deformation of said sealing ring which is pressed said sealing device can implement reliable seal of connecting end faces of transplanting arm shell and transplanting arm cover.
该密封装置借助于密封环在受力时的弹性变形，实现了栽植臂壳与栽植臂盖的连接端面的可靠密封。
The connecting method is that a tooth outline cone type clamping ring is arranged between connected pipes and an outer casing.
这种连接方法是被连接的管子与外套之间装有齿形锥式卡环。
Through the tight fit among the two pipes, the seal ring and the through pipe, the connecting and sealing effects are achieved.
通过两管材与密封圈及通管之间配合，达到连接密封作用。
Main product: Tongyi engine oil, Zhengyang crankshaft, Zhenghe chain, Nanping piston ring, Mingyang connecting rod piston ring, Rushan Gaogui aluminum piston ring, Haijiu battery, Green battery.
主营：统一机油、罡阳曲轴、征和链条、南平活塞环、明扬连杆活塞环、乳山高硅名铝活塞、海久电池、格林电池。
A core regulating pad ring is padded on the lower ring of the thrust bearing, which can make the hook swing in any directions corresponding to the connecting cylinder.
在推力轴承下圈垫上调心垫圈，可使吊钩相对连接筒在任意方向上摆动。
This leads to transformation formulas for the connecting boundary of the dielectric ring loaded waveguide and smooth walled waveguide.
导出了介质环加载波导与光壁波导连接处的模转换计算公式。
First of all, Beijing has a developed transportation network, supported by 5-ring roads and numerous arterial and connecting roads.
首先，北京拥有发达的交通网络，5个环路和众多公路干线彼此相连。
The utility model discloses a single ball separation mechanism; the mechanism comprises the two explosive blots, a strengthening ring, a connection receptacle, a bead and a connecting piece.
本实用新型公开了一种单珠分离机构，该机构主要由两个爆炸螺栓、一 个加强环、一个连接座、一个滚珠和一个连接件组成。
The outer surface of the bracelet ring is coated by gold, silver and decorative coating. The connecting device can adopt a spring or a snap buckle sheet.
手镯环为中空环形结构，采用硬塑或轻金属，外表面镀（涂）金、银及装饰涂料。
The rubber band (5) is connected with the ring-shaped end of the wheel rib connecting piece (32).
在轮筋连接件(32)的环状端部与橡筋(5)连接。
The two unified switches are formed by the inlet door page revolving connecting rod, the sliding chute and the telescopic connecting rod through a ring movement.
成为两扇由进门页旋转推拉杆，滑槽，伸缩推 拉杆相联环运动统一开关。
Disclosed is a pressure dredging device without a rod, mainly comprising a draft tube, a connecting tube, a handle, a compressing ring and a regulating pawl.
一种无杆压力疏通器，主要包括有引管、连管、手柄、压缩圈以及调节爪。
Disclosed is a pressure dredging device without a rod, mainly comprising a draft tube, a connecting tube, a handle, a compressing ring and a regulating pawl.
一种无杆压力疏通器，主要包括有引管、连管、手柄、压缩圈以及调节爪。
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