| 摘要 |
<p>The cover consists of two sections (C1,C2), e.g. of a moulded plastic material, each in the form of a hollow housing with two pairs of aligned and coaxial semi-circular seats (3) designed to fit round horizontal and vertical tubes (5,6). The two sections (C1,C2) clip together round a scaffolding joint from opposite sides or are joined by engaging studs and bushes (10,11).</p> |
