| 摘要 |
The invention relates to a light barrier holder which is characterised in that in order to accommodate a measuring tube (46) provision is made in a body part (48, 75) of a recess (50, 77) which is open towards at least three sides and has a first internal surface (52, 74) and a second internal surface (54, 76) extending at an angle therefrom, and that the two inner surfaces (52, 74; 52, 76) form a prism for fixing the measuring tube (46). <IMAGE>
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