Striation-Defects or contaminations found in the shape of a helix.

The land must make a difference too, in the shape of the clouds.

陆地上一定也看得见异常的现象, 那就是云的式样不同.

We were interested in the shape of the complex in vertical cross-section .

我们对垂直 横剖面 的岩脉组合的形状感兴趣.

This island is in the shape of a cross.

该岛呈十字形.

Advanced features are set with individual DIP switches on the main PC Board.

主PC板上独立的DIP开关 能为焊机带来先进的特性.

The following functions are integrated in the PC board and in front of the operator.

下列功能包括在PC板上,并呈现在操作员面前.

Improve mounting density of components on PC board.

提高了印刷线路板上的零部件贴装密度.

When packaging the circuit, pay special attention to the pc board's layout.

封装电路时, 需要特别注意电路板的布局.

Trayed & Potted PC Board-Ensures long life in harsh conditions.

具有涂层 和 密封的PC板 —— 在恶劣的环境中,确保PC板使用寿命长久.

The pumping unit driven by a linear motor has been successfully used in field.

直线电机驱动抽油机已经成功在油田应用.

The design scheme and working principle of a broad-belt hydraulic pumping unit are presented.

提出了宽带液压抽油机设计方案,以及设计结构和工作原理.

This pumping unit provides for the advantages of high-carrying capacity, life and ease of manufacture.

这种工作机构为单一的 连杆机构,具有承载能力大 、 寿命长、制造容易的优点.

A down-hole autotracking well pumping unit different from the conventional pumping unit was designed.

针对抽油技术的现状和存在的问题,设计了一种不同于有杆抽油方法的井下自动跟踪式抽油装置.

The gear box of pumping unit's lubricating and leaks had seriously affected pumping unit's work.

抽油机减速箱的润滑和漏失问题已经严重影响了抽油机的正常运转,引起了人们的重视.

The pumping unit described in this article consists of a frame-mounted mechanical reversing drum.

齿轮式无游梁长冲程抽油机为机械换向台架式滚筒抽油机.

At present , the widely-used pumping unit is the surface drive device in the rod pumping system.

抽油机是有杆抽油系统的地面驱动设备.

The walking-beam pumping unit has not been fit for oil production in special wells defects.

游梁式抽油机—抽油泵装置已越来越不适应一些特殊油井开采的工艺要求.

Finally author advances a idea about the advantage and foreground of power saving pumping unit.

最后还提出了节能抽油机的优点以及应用前景.

This kind of pumping unit will promote energy-saving and production costs cut.

新型抽油机对油田的节能降耗,降低成本将起到推动作用.

A basic unit of currency in Greece.

德拉克马(现代希腊基本货币单位)

A basic unit of currency in Venezuela.

委内瑞拉基本的货币单位.