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Lift check valve with a spring load can withstand light valve flap, flap valve lift is not high.

起落式止回阀施用一个可承受弹簧荷重的轻量阀瓣，阀瓣的升程不高。

As a downstream piping system when the valve opens, reflux valve, when closed, the main medium used to prevent backflow to prevent the pump and drive motor reversal, as well as a container medium discharge; currently the most commonly used is the valve flap around the body Swing Pin rotation flap valve and the valve body along the vertical axis to move lift check valve, but the above two kinds of structures exist in the valve closed, medium speed back quickly from the largest drop to zero, inlet side of the pipe resulted in the rapid pressure rise, resulting Proportional Pressure Reducing Valves in damaging effects on the piping system of water hammer phenomenon, it is generally a diameter of valve production of 50 ~ 500 mm.

止回阀作为管道系统顺流时开启，逆流时关闭的阀门，主要用于防止介质倒流，防止泵及驱动电机反转以及容器内介质泄放；目前使用最普遍的是阀瓣围绕阀体销轴旋转的旋启式止回阀和阀瓣沿着阀体垂直中心线移动的升降式止回阀，但以上2种结构的阀门均存在关闭时介质倒流速度从最大迅速降为零，致使管道进水管一侧内压迅速升高，从而产生对管路系统有破坏作用的水锤现象，所以一般止回阀生产口径为50～500 mm。

Objective To discuss the application of Mitomycin C under safe effective concentration in excision of pterygium with conjunctival flap autograft and observe the efficiency on the prevention of primary pterygium from relapse.Methods Incisions of 64 primary pterygia in 54 cases were performed with conjunctival flap autograft. MMC was used in operation or post-operation. After 5 to 12 months of follow-up, a comparison was made on the relapse of primary pterygium between the above-mentioned group and another 33 pterygia in 27 cases that only performed the similar operation without the application of MMC.

目的 在安全有效浓度下，将丝裂霉素C应用于翼状胬肉切除联合自体结膜瓣移植术中，观察对翼状胬肉复发的防治效果方法对54例64眼原发性翼状胬肉者施行显微镜下胬肉切除带蒂结膜瓣移植转位移植联合术中或术后丝裂霉素C的应用，经5～12 月的随访，以单纯手术组（27例33眼）原发性翼状胬肉术后复发情况作对比分析。

METHODS: The blood supply of fibular musculocutaneous flap and the biomechanical characteristics of heel were studied by anatomical examination. One case with right heel full defect because of explosion injury was repaired by transfer of reversed island fibular vessels. The fibular flap was 14 cm in length with part of peroneus muscle and long flexor muscle of great toe. RESULTS: The lower part of fibular artery had plentiful anastomosis with anterior tibial artery and posterior tibial artery, which could provide ideal reversed blood supply.

应用解剖学的方法研究腓骨肌皮瓣血供及跟骨的生物力学特征，并在标本上进行摹拟手术。1998年5月为1例右足跟爆炸伤后2个月，全足跟缺损患者采用腓血管蒂逆行岛状腓骨肌皮瓣移位修复，腓骨瓣长14cm，带部分腓骨肌及口止母长屈肌，皮瓣为14cm×12 cm。

In the clinical use of the pre-expanded axial-pattern flap, we noticed that partial necrosis of transferred flap might develop following over pre-expansion.

在预扩张轴型皮瓣的临床应用中我们观察到大量预扩张的轴型皮瓣转移后可能出现皮瓣局部坏死的现象，但目前这方面的研究还比较局限，缺少对轴型皮瓣扩张的安全限度的了解和对皮瓣血液循环立体结构影响的观察。

Pin-style hinges are used which get epoxied into the wing and flap from the underside to provide a slotted flap.

销式铰链使用其中获得epoxied进入机翼和皮瓣的底部提供一个开槽皮瓣。

On the base of former rigid wing model , new flap- wing model is developed by considering the deformation of wing and the change of flapping velocity, so it can simulate the flap motion of bird wing better.

本文在原有匀速刚性模型的基础上，提出考虑了扑翼形状变化和扑动速率变化的扑翼分析模型，使之更接近鸟翼柔性扑动真实情况。

A new repairing technology making use of brush plating of Ni-W coating was established to repair the worn piston of wing flap motion tube,based on the failure analysis of the worn piston of wing flap motion tube.

试验表明，通过这种工艺，可以获得满足修复磨损活塞要求的镀层。

Abstract］ Objective To sum up the experiences of tongue repair after radical operation of tongue carcinoma with free forearm flap in the last five years.Methods The clinical data of 12 patients underwent forearm free flap grafting for tongue repair from 2000 to 2006 were retrospectively analysed.

目的 探讨臂桡侧游离皮瓣在舌癌切除术后舌再造中的应用方法对南昌学第附属医院2000年以来12例应用前臂桡侧游离皮瓣修复舌癌切除术后舌组织缺损的病例进行临床分析，总结有关处理经验和教训。

Under the conditions of keeping other design parameters constant, design thickness of valve flap increases with the mass increment on single wheel spring of the vehicle; throttle gap of oil-air spring is in linear decrement relationship with mass on single wheel spring. For each mass increment of 100kg on tested single wheel spring, design thickness of throttle valve flap will increase by 0.007mm and the throttle gap will decrease by 0.001mm.

在其它设计参数保持不变的情况下，阀片设计厚度随车辆单轮簧上质量的增加而增加；油气弹簧节流缝隙与单轮簧上质量成线性递减关系；试验的单轮簧上质量每增加100kg则节流阀片设计厚度将增加0.007mm，节流缝隙将减小0.001mm。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。