windmill flange system construct.

[Shouldbe]

Пожалуйста, помогите перевести.

Выражение встречается в следующем контексте:

The multi-hole open profile reinforcing crosspieces on the 90/60/45 cm panels permit both the passage of tie-rods in various positions and the installation of angels [angles?] and pillars using a windmill flange system.

I understand hardly anything in the sentence. Would be absolutely grateful if somebody could translate all of it, however, about "windmill flange system" I am especially uncertain. My current version is "wind protection system".

P.S. The text is about formmwork panel systems.

Заранее спасибо

[kotechek]

Хм, а windmill - это не та же крестовина, а? По форме, вроде бы, похоже.