π§±β‘οΈπΊ
βοΈβπ³π±οΈ
π±β‘οΈπͺ¨β‘οΈπ³
πΆββοΈπ§±β‘οΈπ
π‴οΈπ‡οΈπ
#manufacturing preform #glass preform #shaping #forming #raw material #intermediate step #ceramic preform