Sizning "Penskiy-Martens usuli yordamida yopiq tigeldagi bitumning porlash nuqtasini aniqlash uchun asbob." mahsuloti haqida sharhingiz

Penskiy-Martens usuli yordamida yopiq tigeldagi bitumning porlash nuqtasini aniqlash uchun asbob.