| 摘要 |
A seat belt includes: a lap strap stretchable around the waist of an operator, in other words, laterally stretchable across a seat surface; an AL retractor that is configured to wind the lap strap; a shoulder strap stretchable from the shoulder to the waist of the operator, in other words, stretchable from an upper portion on one side of the backrest to a lower portion on the other side thereof; and an EL retractor that is configured to wind the shoulder strap. |
