English translation: vetical scan(ning) motor, vertical scan(ning) roller
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Thank you very much, this is the right one. I am sure now, because later in the text 主走査方向矩形パタンのプロファイル is referred by a variable called Hprofile, and the same thing for 副査方向矩形パタン is Vprofile, where H and V must be horizontal and vertical.
The reference material is also great for the topic. 4 KudoZ points were awarded for this answer