An acoustic shielding article which includes a shaped thermoplastic element that has a metal inlay element fixedly attached thereto, is described. The obstacle detection stopping device comprises a support member, a rotary drum, a cam clutch, and a winding pulley. The top surface includes a recess formed therein whereby fuel flows into the recess from the supply passage. Span function is specific to the bending span configuration used and can change during measurement of a board.