QUARTZ GLASS ROD AND MANUFACTURING METHOD THEREOF

METHOD FOR FABRICATING A TRANSPARENT OPEN CONTAINER

METHOD FOR REFORMING GLASS TUBES INTO GLASS SLEEVES

TUBE BENDING APPARATUS

Process for producing double helical glass tube, light-emitting tube for fluorescent lamp, and fluorescent lamp

Manufacturing method of an arc tube formed from a glass tube and having a spirally wound section within one plane

Manufacturing method of arc tube having a glass tube of a flat-spiral shape, arc tube, and fluorescent lamp

Arc tube formed from a glass tube and having a spirally wound section within one plane

Fluorescent lamp and manufacturing method for arc tube