A constant velocity universal ball joint includes an outer joint part, an inner joint part, torque transmitting balls guided in pairs of tracks, and an annular ball cage held between the outer joint part and the inner joint part, wherein the ball cage forms an inner face which is internally widened between two end apertures of the ball cage. The PAPR assembly forms a portion of a belt or bandolier to be worn around the user’s waist, back, or other location, and at least the belt body can be made of a flexible rubber material, such as a Butyl and Silicone blend, or any other suitable material to conform the PAPR belt to the user’s body. The depth of command data to be captured or stored can be defined by specifying an index value in the data structure. In an alternate embodiment of the invention, the moisture-reducing paper tray may also include a drying mechanism which includes a heating element, a blower and a humidity sensor. 1\u02dc1%, an undoped GaN layer formed on the Al-doped GaN layer, and an AlGaN layer formed on the undoped GaN layer such that a two-dimensional electron gas layer is formed at an interface of the undoped GaN layer. The method for manufacturing the embedded package structure also provides.