白体镶黑边的老款打字机的键盘向使用者发出邀请，请他们演奏强有力的协奏曲，同时银色的打印杆一升一降，嗒嗒作响。
On older models the keys, metal-rimmed with white inlay, invited the user to play forceful concertos on them, while the silvery type-bars rose and fell chittering and whispering from their beds.
门座式起重机分单臂架和四连杆两种类型，起重机的起升、变幅、回转和行走四大机构均采用交流变频调速，整机采用PLC控制，使用性能优越。
Portal crane sub frame and four-link arm two types, from the crane hoisting, luffing, slewing and walking four agencies ac frequency control, the machine USES PLC control, superior performance.
通过分析不同从动件与凸轮的几何关系，推导出一组平底挺杆、滚子或球面挺杆、尖锥挺杆升程的相互转换通用公式。
Based on the geometrical relation between tappets and cams, uniform formulas for mutual lift-range transition between flat based tappet, roller (or sphere) tappet and cone tappet were presented.
从纵向堆垛稳定、横向堆垛稳定及起升缸的压杆稳定三方面入手，对叉车最大起升高度起重量进行理论计算，通过综合分析比较来最后确定，并作实例分析。
With analyse and compare the results of calculate stability on longitudinal, lateral and lift cylinder, confirm the forklift capacity at Max. lift height, and make example analysis.
该项工艺省去原机械举升中的油管，利用空心杆作为传动介质和油流通道，下冲程挤压排液。
This technique eliminates the tube in conventional mechanical lifting, takes hollow rod as the transmission medium and oil flow channel and discharges fluid during down stroke.
设计结果及现场生产分析结果表明，空心杆掺稀油是一种适合于深层稠油冷采的举升方式。
The results of the design and the field present that mixing light oil of hollow rod is a lifting technology suitable for cold…
利用液压挺杆内部独特的结构设计，可自动调节配气机构传动间隙、传递凸轮升程变化、准时开闭气门。
Using hydraulic valve plunger interior unique structural design, but automatic control timing mechanism transmission gap, transmission lift of CAM change, punctual make and break tire valve.
根据举升系统设计理论编制了SAGD有杆泵举升系统优化设计软件，并利用软件优化设计了一口稠油sagd井的举升系统。
According to the lifting system design theory, SAGD rod pump lifting system optimization design software was programmed and tested to design a new lifting system.
吐哈油田自91年投产以来，随着油田的开发地层压力逐年下降而气油比呈急剧上升趋势，特别是温米油田出现了大批的高气油比油井，这给目前采用的有杆泵和电潜泵举升带来了一定的难度。
TUHA oil field has been putting into production in 1991, with the development of TUHA oil field, the reservoir pressure is dropping off, the gas oil ratio(GOR) is quickly rising.
第三章，设计了有杆泵举升系统的液压系统部分。
砖烟囱属高耸构筑物，本例应用木结构内脚手架形成作业面，采用附着自升式独臂拔杆作为垂直运输工具。
Brick chimney is a kind of high-rise structures. In this essay, we use the inside-timber-scaffold system as operation area and, the mast crane as means for up-and-down transport.
砖烟囱属高耸构筑物，本例应用木结构内脚手架形成作业面，采用附着自升式独臂拔杆作为垂直运输工具。
Brick chimney is a kind of high-rise structures. In this essay, we use the inside-timber-scaffold system as operation area and, the mast crane as means for up-and-down transport.
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