| 摘要 |
SELF CLEANING DEVICE FOR SIGHT FLOW INDICATORS A self cleaning device for rotatable sight glass equipped visual flow indicators (for visually indicating fluid flow therethrough) that includes several stationary wiper implements that each include a wiper holder fixedly mounting a wiper in the form of a tube of compressible material that is in compressed wiping engagement with the inside surfacing of the sight glass, for improved wiping away of foreign materials when the sight glass is rotated for this purpose.
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