A dual variable-diameter wheel pumping unit, which has long stroke and low pumping speed and large load capacity, is designed based on conventional beam pumping units.

双变径轮式抽油机是在继承常规游梁式抽油机优点的基础上设计而成的大载荷、长冲程、低冲次节能型抽油机。

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The crank-chain driving and long stroke pumping unit described in this papes is a new type of pumping unit.

曲柄链条动滑轮式长冲程抽油机是一种新型抽油机。

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The cylinder chain lower super long stroke pumping unit is a kind of up to date and high efficiency equipment.

圆柱链低矮式超长冲程抽油机是一种新型高效有杆采油设备。

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Denmark's embarrassment was compounded when Long had acres of space to stroke in the fourth goal on 66 minutes with the home defenders nowhere to be seen.

BBC: SPORT | Football | Internationals | Denmark 0-4 Republic of Ireland

Cerovive is the first drug to target the toxic compounds that are produced by the starved brain cells--and it can be used as long as six hours after the stroke.

FORBES: Magazine Article

At a stroke, this demolishes the long tradition of universal benefits, which was intended to secure general support for welfare.

ECONOMIST: Britain's budget