| 摘要 |
PROBLEM TO BE SOLVED: To prevent the bulge of a lid due to thermal expansion. SOLUTION: Regarding locking claws formed along the front and rear sides of a lid 11, a positioning rib capable of laterally positioning the corresponding locking hole 7 of a lid coupling recess 61 is provided at both sides of one locking claw 9 positioned approximately at a center. Similarly, a positioning rib capable of longitudinally positioning the corresponding locking hole 8 of a rid coupling recess 61 is provided at both sides of one locking claw 101 positioned approximately at a center among locking claws formed along the right and left sides of the lid 11. |
