| 摘要 |
A structural element (10) comprising a first member (12) and a second member (14) interengaged with one another. Each member (12, 14) has an inner layer (16, 18) formed from a machinable material and having a substantially smooth outer surface (24, 26), and an outer layer (28, 30) having a substantially smooth inner surface (32, 34) of a shape generally complementary to the shape of the outer surface (24, 26) of the inner layer (16, 18). The inner (16, 18) and outer (28, 30) layers are joined together such that the outer surface (24, 26) of the inner layer (16, 18) and the inner surface (32, 34) of the outer layer (28, 30) are in substantially continuous, face-to-face engagement with each other. The inner layer (16) of the first member (12) has a first formation (50) machined therein. The structural element (10) further comprises an element (52) for interconnecting the first formation (50) of the first member (12) with the second member (14) thereby to form the structural element (10). |
