Hydrodynamic face seal features are provided either on the mating face of the primary sealing ring or on the annular face of the rotating liner.

The protective overcoat layer can be applied to the image-bearing side of the element or to the support side of the element or to both sides.

The control element (200) is provided with a control face (210) that is sealed and abuts with the fixed face (110), and a communication groove (220) recessed in the control face (210).

Several pressure segments (4) are provided on the side of the pressure element (2) that is subjected to a transversal stress, i.e. on the side that faces away from the hollow body (at the top in the figure).

A mask is positioned on the gripper face.

A magnetic shield (12) is provided on the upper end face or on the upper end face and side faces of the detection head (5).

The absorbent layer is provided with an excrement low-absorption section (131) disposed on its side of the surface sheet (11) and an excrement high-absorption section (132) disposed on its side of the backside sheet (12).

The support face has bolt holes arranged thereon; a plurality of locking apparatus are arranged distributedly on the support face via the bolt holes.

The plastic material is formed so as to expose the active circuitry on the face of the die and a central portion on the back of the die.

At least a protuberance (212) which engages with the outer end face of the cylindrical step (422) is provided on the inner face of the top ring (21).

An electronic keypad (13) for the combination lock is mounted in the face of the pistol grip handle.

The connecting rod (103) is protrudingly formed on the matching face (102).

Finally, a connector (18) is provided on the connector side.

The substrate is then oxidized to form nickel oxide scale (34) on the ceramic contacting side and a cobalt oxide scale on the metal contacting side.

A conical notch (6) is designed on the electrode (5) face, covering 10 to 15 per cent of the face surface and is 1mm deep.