| 摘要 |
A base for attaching to at least one end of a glass tube (12) that has two air-tight sealed ends, the at least one end having a remaining exhaust tube (38) that extends in a tube axis X direction of the glass tube, the base comprising: a base body (46) that is in a shape of a bottomed tube including a tubular part (42) and a bottom part (44), and receives the at least one end; and a pair of base pins (48, 50) that have been disposed upright on the base body (46), wherein the base body (46) has a housing part (52) that has been disposed in a center of the bottom part (44) so as to project in the tube axis X direction, and houses at least part of the remaining exhaust tube (38), and the base pins (48, 50) have been disposed upright on the bottom part (44) in substantially parallel to the tube axis X direction such that the housing part (52) is located between the base pins (48, 50).
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