| 摘要 |
<p>With respect to a first flat surface (S1) including a center axis (1a) of a screw rotor (1), a second flat surface (S2) orthogonally intersecting with the screw rotor center axis (1a), and a third flat surface orthogonally intersecting with the first flat surface (S1) and the second flat surface (S2), the gate rotor center axis (2a) passes a cross point (P) of the first flat surface (S1), the second flat surface (S2) and the third flat surface, and is tilted to the same side as a groove section (10) of the screw rotor (1) from the second flat surface (S2) when viewed from a direction orthogonally intersecting with the third flat surface.</p> |
