| 摘要 |
There is a support device (130) and a collar (170) which are formed in several sections, and inclined one to another, to equal the number of receiving heads (20). Each section has two parallel sides with a semi-cylindrical cavity perpendicular to them, so as to define the housing for the receiving heads. The angle between the parallel sides of adjacent sections is about 192 degrees, and the housings are situated in different horizontal planes, shifted vertically by about 5 mm. Each support section fixes on the elbow (120) by means of a hole and a protruding lug. |
