气缸

The treadle pump is easy to build from bamboo or other wood and 2 metal cylinders with pistons.

踏板抽水机很容易制造，用竹子或其它木材，加两个有活塞的气缸就能制成。

Terms like simplex and triplex indicate the number of cylinders a particular pump features.

单缸"和"三缸之类的说法，表示的是某一专门水泵所有的气缸量。

TW-600 Outside pumping vacuum packer: using air pressure style sealing, and it is clean and reliable; adopting the Japanese and Korea technology and equipment, is provided with dual functions of vacuum and charge; the whole machine circuit is from Korea and is programmable control, and is stable; sponge shape silica gel bar to ensure a fine airproof after pumping out the air; using the variable stroke air cylinder to make sure the sealing is neat and tidy; it is a perfect safe packaging after the product charge; stainless platform, and can adjust the height freely in terms of the size of the packaging goods; and also can change the work place easily for its installing truckle; simple style storage case to store the vacuum packaging bag or spare part in common use; Light touch style padding switch can be operated conveniently.

TW-600外抽式真空包装机：采用气压式封口，干净、可靠；日、韩先进的技术设备，具有真空及充气双重功能；整机电路由韩国可编程控制，性能稳定；海棉状硅胶条，确保抽气后密封良好；采用变行程气缸，使封口整洁平整；充气后产品理想的安全包装；不锈缸工作台，根据包装物的大小，任意调整高低；装有脚轮，可任意移动工作地点；简易型储物盒，存放真空包装袋或常用备件；轻触式脚踏开关，方便操作。

"In the two-cycle engine, the piston acts as a valve, clearing valve port s in the cylinder wall as it nears BDC."

在二行程发动机中，活塞起到阀门的作用，当活塞接近下止点时，使气缸壁上的进排气口打开。

The research work of this thesis has much guiding significance on the design of the two-stroke engine.

结论和提出气缸气口的改进设计方案。本文的工作对二冲程柴油机的结构设计具有一定的指导意义。

Precise describe of geometry structure is an important premise to realize numerical simulation, but the diesel model refers to intake system, exhaust system, turbocharger system, fuel injection set, cylinder and crank case etc, which have complex structure, therefore, if the geometry model is established as true structure, it will spend a great lot of time and it is unrealizable and unnecessary.

几何结构的精确描述是实现准确实现数值模拟的重要前提，但柴油机模型涉及到进气系统、排气系统、涡轮增压系统、喷油组件、气缸和曲轴箱等诸多实体，而且结构极其复杂，如按真实实体结构建立计算几何模型需要花费大量时间且难以实现，也没有必要。

The distribution of gear's contact stress, root stress, and contact engagement line in the engagement situation of gear pairs, were obtained on the base of explicit integration method. 3. Adopting the method of system matrix, the torsional vibration differential equation of general shafting was gained. The simple harmonic forms of excitation torque under the normal combustion or piston flameout of in-line engine and v-type engine were analysed. The decoupled algorithm of free vibration and forced vibration and the solution to the vibration damper's energy of resistance and the off-resonance calculation were studied. The sensitivity formulations of the natural frequency and vibration mode to physical parameters of system were derived by solving the eigenvalue problem. These sensitivity formulations provided the theoretical base for the dynamic modification of structure.

运用系统矩阵法建立了轴系的扭振微分方程，并对直列和V型发动机在正常发火和气缸熄火工况下的激振力矩进行了详细的简谐分析；基于精确方法推导了自由振动和强迫振动的解耦算法，给出了能量法计算中的减振器阻尼功求解和非共振计算方法；并研究了曲轴系扭振非线性分析中的变惯量问题，得到了单缸转动惯量的精确求解公式以及变惯量和固有频率的关系式；最后，从特征方程和振型正交性出发，推导了固有频率和振型对轴系转动惯量和刚度等物理参数的灵敏度，为扭振系统的结构动力学修改提供了理论基础。

The machine is scientific designed with strong air-float strength and fine flatness. There are longitudinal and widthwise plate-against device.

整机设计合理，气浮力大，分纵向和横向气缸顶片装置，台面平面度好。

There are longitudinal and widthwise plate-against device.

整机设计合理，气浮力大，分纵向和横向气缸顶片装置，台面平面度好。

Safe and reliable Z-axis pneumatic counterbalance and electromagnetic valve-controlled antislip systems.

气缸式Z轴重量平衡系统及电磁阀控制防滑落系统安全可靠。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。