A sleeve body with bearings interposed between the sleeve body and a center shaft portion is integrally coupled to an oil pulse generator. In the panel, a sinusoidal wave is used for forming wall charges. 2) Bonding a first conducting wire on the first conducting ball, the first conducting wire being connected to a first second conductor. The inlay preforms can be modified with standard acrylic andor porcelain burs and inserted with standard dental bonding material. Preferably the secondary inlet passage may be selectively partially or completely isolated from the main air inlet. The box blank 35 also possesses a structure which reduces the forces bearing on its structural walls when loaded and stacked.