Not known Factual Statements About led shamollatish teshiklari
Hozirgi zamon o‘lchash natijalariga ko‘ra, yorug‘likning vakuumdagi tezligi 299792458 m/s ga teng.Shamollatish quvurlari keskin kengayish yoki qisqarishdan qochish kerak. Kengayish burchagi twenty darajadan oshmasligi kerak, shrink konus esa 60 darajadan oshmasligi kerak. Shamollatish quvurlari iloji boricha muhrlangan bo'lishi kerak va barch