| 摘要 |
The foam reactants are prepackaged within replaceable pressurised containers and having projecting dispensing valves connected to a manually actuated dispensing nozzle through flexible tubing. There are brackets for holding the top and base of the containers in side-by-side relation, a T-shaped member for actuating the dispensing valves in unison, and a manual key with an elongated shank extending through bores in the brackets and the T-shaped member. The key shank and the bores are threaded to provide opening or closing movement of the container dispensing valves. |
