زانوی UPVC سایز 21 جهت ایجاد زوایای لازم در خطوط لوله برق به کار گرفته می شود و از آن جهت اتصال دو لوله سایز 21 به هم استفاده می شود .
با استفاده از روشهای زیر میتوانید این صفحه اشتراک بگذارید.
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