1.   Each throttle shaft has a butterfly valve that controls how much air gets into the engine.

2.   He says every golf shaft has irregularities.

3.   The new pumps were designed to withstand combat damage, so the shaft had no weak point.

4.   Engineers said the shaft might have to be reinforced with cement, a time-consuming process which could take days.

5.   Engineers said the shaft might have to be reinforced with cement, a time-consuming process that could take days.