The diameter of the suction bore is greater than the diameter of the discharge bore.

The diameter of the bore (14) without the curable compound is smaller than the diameter of the bore (14) with the curable compound.

The piston housing also includes a recess disposed at the second end of the piston housing, the recess being concentric with the bore and comprising a diameter larger than a diameter of the bore.

At the bore (10) the width of the slot (12) is narrower than the diameter of the bore.

At a transitional part at the outer ends of the bore the bore diameter narrows down to be substantially equal to the inner tube diameter of the circulation vloop.

The piston body defines an outer diameter that is at least 75% of a diameter of the central bore.

At least a portion of the bore has a continuous taper, such that the diameter of the bore decreases in the vicinity of the insert.

This connection has a screw threaded section (15) of smaller diameter than the bore of the faucet near its internal end.

Another configuration may include reducing the diameter of the bore of the meter body.

The diameter and the bore of the core are perfectly calibrated, it is all very precise.

To Determine "Bore" to Diameter, add wall clearance of +0.04mm (0.00157) to maximum Bore Size.

The diameter of the hollow central bore is preferably less than or equal to 20mm, more preferably 16mm.

The main bore of each nozzle is of circular cross-section, but a profiled plate causes the resulting water curtain to have a width which is narrow relative to the diameter of the nozzle bore.

In the circumferential direction, at a junction of the radial slot (14) with the axial bore (12), the radial slot (14) is provided with a width that is smaller than a diameter of the axial bore (12).

A ratio of a diameter of the combustion bowl (730, 830, 930, 1030) to a diameter of the cylinder bowl bore is from 0.68 to 0.74.