| 摘要 |
The holder has a housing for retaining transmitter and receiver and including an opening (54) for the entry of the radiation from a light barrier. An upper surface (56) of the housing is curved in a doom shaped manner in the area of the opening. A tubular lug (58) is inserted through corresponding openings of mounting units (60, 62) having corresponding doom shaped curvature and is fixable by a locking unit. |
