The sliding bolt assembly (C50) includes a sliding bolt (C5), a water mixer (C1), a spring gasket (C2) and a protecting spring (C4).

The sliding bolt (2) is sleeved in the sliding housing (1), and one end of the sliding housing (1) has an internal conical shape.

The screw rod (6) is sleeved in the sliding bolt (2), and the top support (4) provided on the end of the sliding bolt (2) can press against the sliding housing (1) and move it into a hole.

The screw rod (6) is sleeved in the sliding bolt (2).

An expansion screw with a VH-shaped sliding housing includes a sliding housing (1), a screw rod (6) and a sliding bolt (2).

All the frames have one fixed slide bolt received in one of the two sockets in the beam.

The spring gasket (C2) is pressed in the inner sleeve (C53) of the sliding bolt by the protecting spring (C4).

A pneumatic assembly for a paintball gun preferably includes a bolt slidable between an open and a closed position.

The sliding bolt (C5) includes inner and outer sleeves (C51-C53) and a water passage (C541) is formed between the inner and outer sleeves.

The thermostatic controlling device (C) includes a return spring (C6) which presses a sliding bolt assembly (C50) dynamically cooperated with a heat-sensitive element (B2).

The sliding bolt (3) is operated by a rack (7), which can be moved by a toothed wheel (8) worked by means of a lock mechanism (4).

The heat-sensitive element (B2) passes sequentially through the water mixer (C1), the spring gasket (C2) and the inner sleeve (C53) of the sliding bolt.

The sliding bolt (C5) is pressed between an upper lid (A3) of the valve body and a mixing water outlet (A14) by the return spring (C6).

At each corner, the structure includes a corner post (188) which emulates the channel into which the sliding bolt (38) moves and permits the securing of panels thereto.

A plurality of water inlet holes (C13) is distributed on the upper part of the water mixer (C1) whose lower part is fixed to the upper end of the inner sleeve (C53) of the sliding bolt.

When the screw rod (6) is twisted and fixed, it brings the sliding bolt (2) to move and expand the sliding housing (1) to press the hole and be cling to the hole wall, so as to achieve a better fixing effect.