Like the lace kniting pattern on top, and precisely *that* is the one without a legend for symbols - I think the "U" is a yarn over or yo, and the downward arrow is a ~~ УЗОРЫ ДЛЯ ВЯЗАНИЯ.
Posts on the topic of 05 - Ажур. added by Nadezda Vasiljeva
Widen the knit section between the yo columns for use with a variegated yarn.
Would make a nice scarf
russian with diagrams