Connection part of the outer peripheral face of edge of the cover section (7, 8) and outer peripheral of the base body (10) constitutes a smooth continuous state without layer difference.
罩部(7、8)的缘部的外周面与座体(10)的外周面之间的连接部位构成为没有层差的平滑连续的状态。
Connection part of the outer peripheral face of edge of the cover section (7, 8) and outer peripheral of the base body (10) constitutes a smooth continuous state without layer difference.
罩部(7、8)的缘部的外周面与座体(10)的外周面之间的连接部位构成为没有层差的平滑连续的状态。
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