The invention discloses a laser marking machine which comprises a machine body and working head which are connected by optical fiber.

本发明揭露一种激光打标机，包括机身本体和工作头，其中，所述机身本体和工作头由光纤连接。

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The calculated result from an example shows that the stable sectional area reduces with the increase of working head, or the decrease of the tailrace tunnel length.

计算结果表明，尾水调压室断面面积随水轮机工作水头的增大或尾水洞长度的缩短而减小。

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The paper introduces the main functional design of a kind of small cutting coal machine with hydraulic fork lift as feed power and chain-saw cutting knives driven by generator as working head.

论述了一种利用液力叉车作为进给动力，由电机驱动链锯式割刀作为工作头的小型立式割煤机的主要性能设计。

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John Taylor was Becta's head of school improvement, working with head teachers to help them use and plan for the best use of computers in their schools.

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By the time his peers were writing application essays, Karp was working as head of product at the parenting website UrbanBaby.

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Roughly the same age as David Cameron and Nick Clegg, Mr Miliband became an MP in 2001 after working as head of the Downing Street policy unit.

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