A LED package structure includes a substrate unit, a light-emitting unit, a support unit, a lens unit, an input unit and a control unit. In particular, relations among distinct price curves and buyers or potential buyers are disclosed. The highest protection level is achieved with 11 protection. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber thereof. The invention also relates to a seat which is provided with a thorax airbag device without housing which is mounted by a guide yoke and a tearing thread.