| 摘要 |
<p>Invention relates to innovations in body o-ring groove system of liquid transferring plastic pipe fitting couplings without any diameter limitation, for all type of pipe fittings (drinkable/city water, pool, garden, nozzle etc.) or irrigation equipments (sprinkling, drip irrigation etc.), which provides exact body tightness and facilitates assembly/disassembly operations.</p> |
