重锤

The dynamic response of seabed induced by cyclic loading at subaqueous delta of Yellow River was simulated by hitting a load plate with sledgehammers of several weights dropped freely from several heights.

摘 要：采用不同重量的重锤自不同高度处自由落体捶击荷载板，研究不同能量大小的循环荷载对黄河水下三角洲土体的动力响应过程。

Analyses the features and the problems of the explosion door of the air shaft and improves the structural steel ring and the balance weight of door.

分析了煤矿风井防爆门存在的漏风、密封液选择、使用比较困难和开闭不便等问题及其原因，并针对这些问题对防爆门的型钢圈和平衡重锤进行了改进设计，实践证明，改造后的新型防爆门性能明显优于改造前，提高了煤矿风井防爆门的安全可靠性，具有一定的推广价值。

Year-old Jerry Ferro nothing, to think that he was once a promising young amateur boxer, known as "hammer attack" and later worked as construction workers and more than, the current stadium at night when boxing coach interest classes, students are middle-aged middle class.

40岁的Jerry Ferro一事无成，想当年他曾经是个很有前途的年青业余拳手，外号&重锤出击&，其后当过建筑工人和多份工作，目前当体育馆晚上拳击兴趣班的教练，学生都是中年的中产阶级。

Should re-adjust the amount of compression spring or a heavy hammer position; valve flap and valve seat stick.

应重新调整弹簧的压缩量或重锤的位置；阀瓣与阀座粘住。

Theconstant control device of adjusting wire tension with two wire winding drum s is studied on the basis.

分析了高速走丝线切割机使用重锤式恒张力机构存在的缺点，在此基础上研究了一种能够实现调节电极丝张力的双贮丝筒恒张力控制装置。

Introduce the heavy hammer structure and lock framework with machine combine with solenoid parts of the hydraulic check valve,explatiate on the composing the work principle and character.

介绍了液控止回蝶阀的升降式重锤结构和机械电磁联合锁定机构，阐述了其组成、工作原理和特点。

With the use of boilers, 1681, has emerged lever hammer safety valve.

随着锅炉的使用，1681年又出现了杠杆重锤式安全阀。1769年瓦特蒸汽机出现以前，旋塞阀和止回阀一直是最主要的阀门。

Lever-type safety valve lever to rely mainly on the weight of the work force, but the lever-type safety valve size often limit the choice of scope.

杠杆式安全阀主要依靠杠杆重锤的作用力而工作，但由于杠杆式安全阀体积庞大往往限制了选用范围。

Safety valve for manual should be regularly put on gas or Other pumps drainage experiment; lever-type safety valve lever is stuck or the hammer is moved.

应定期对安全阀作手动放气或放水试验；杠杆式安全阀的杠杆被卡住或重锤被移动。

Lever-type safety valve lever hammer mainly depend on the force and work, but because of the huge Closed Spring Loaded Full Bore Type-High Pressure Safety Valve volume of leveraged safety valve is often limited range of choice.

杠杆式安全阀主要依靠杠杆重锤的作用力而工作，但由于杠杆式安全阀体积庞大往往限制了选用范围。

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。