| 摘要 |
V-grooves (181, 182) are formed in the outer peripheries of sealing sections (151, 152) sealed by reducing the pressure in a heater lamp (11), and the heater lamp can be supported at the V-grooves by clampers that can perform both positioning and installation functions. The heater lamp (11) can be reliably installed by a simple structure that supports only the sealing sections (151, 152).
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