Assertion: milking machine's teat cup | /r/HasAspect | a lswinging movement
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Source sentences:
text: A milking machine having a plurality of teat cups, a pulsator having a casing, and a piston working therein, and two frames, one frame being pivotally supported upon the pulsator casing and the other frame being pivotally supported upon the piston, said teat cups being supported upon said frames, and said frames being jointed whereby the teat cups may have a lswinging movement confined to a horizontal plane.