| 摘要 |
The housing mold (10) has two parallel H-shaped branches (12,14) having preset ends which are provided with primary connectors (16,18) for heating tubes (32,34), respectively. The auxiliary connectors (20,22) and beam (24) are provided at specific ends of branches, respectively. The branches are connected together through a valve seat (26) and a receptacle (28) so as to form a valve head. The primary connectors and auxiliary connectors are provided at 180[deg] rotational symmetry about an axis (A) perpendicular to the H-plane, through the center of the beam. |
