| 摘要 |
<p>A mastic gun comprising a barrel (1), a piston on a piston rod (4), an operating mechanism (3) for advancing the piston rod (4), and a nozzle assembly (2) for delivery of the mastic. The nozzle assembly (2) comprises a nozzle holder (27) which extends through an aperture (31) in the end wall (22) of the barrel and has at least one spring biased detent (41,42) to retain the holder in the aperture and a nozzle (51) retained in the nozzle holder, the nozzle preventing release of the detent (41,42).</p> |
