| 摘要 |
<p>The manually operated tool for clearing outlets of domestic sinks is readily operated without previous training and it is safe to use. This tool uses a pressurised aerosol spraying tin. The commercial aerosol tin (1) is provided with a connecting head (5) which can slide on the tin top. The front end (7) of this head is spherical. A spring element (13) is fitted between the head and the top of the tin. A central hole (10, 12) is arranged in the front end of the cap and a plunger (8) is provided for actuating the valve (4) of the aerosol tin against the spring. The spherical end is pushed against the drainer opening and the pressurised gas enters the drain.</p> |
