And due to an explosion, an iron rod passed through his head like so.

因为一次爆炸，一个铁棒像这样穿过了他的头。

耶鲁公开课 - 心理学导论课程节选

Using a legitimate club head or even a photograph as a model, rapid-prototyping technology can spit out CAD files and create a master for a driver or iron head quickly and inexpensively.

WSJ: Psst��Wanna Buy a Counterfeit Golf Club? | Golf Journal by John Paul Newport

At a recent golf-industry show, however, the U.S. working group displayed examples of counterfeit clubheads sawed in half, and you can see the type of irregularities that impact performance: irregular interior walls, or supposedly hollow iron-head cavities that instead are solid steel.

WSJ: Psst��Wanna Buy a Counterfeit Golf Club? | Golf Journal by John Paul Newport

This iron lung can be tipped head down and rotated through 180 degrees so that I am lying face down.

CNN: 'I lived in an iron lung for seven years'