That changed in 1958 when Jerry Crew, a bulldozer operator working in Humboldt County, California, made casts of the bizarre footprints he had found.

情况到1958年发生了变化，在加利福尼亚州洪堡县开推土机的杰里·克鲁发现了一些奇怪的脚印，并制作了石膏模型。

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This paper briefly describes the design of operator cabin of brick type of bulldozer, and discusses the improvement measures of main part of cabin and ceiling.

对积木式推土机驾驶室设计作了简单介绍。论述了驾驶室主体和顶棚的改进措施。

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"It's nuts, man, " says 49-year-old Clyde Wheatley, a bulldozer operator whose Rottweiler and Labrador have no barking violations.

WSJ: Hawaii Turns to Dog Shrink as 'Incessant Barkers' Cut Plea Deals

This is no different from a bulldozer operator's receiving more money than an old-time ditchdigger wielding a shovel.

FORBES: Fact and Comment