| 摘要 |
<p>A length adjustable bolt (2) engaged with opposing sides of the door or window frame (32) comprises two tubular parts (3, 4), their first end sections having protrusions (21, 22) engageable with the frame, while their second end sections cooperate with each other. The tubular parts overlap in a telescopic manner at their second ends. The first tubular part (3) has a coupling component inside it, and the second tubular part (4) has a coupling component in its second end section.</p> |
