| http://www.w3.org/ns/prov#value | - Further, similar to the potting material 102 of the first embodiment, a resin such as an epoxy resin, which is permanently soft but insufficient to inadvertently drip, is adopted as the potting material 302 such that each sensor IC 250(1), 250(2) and each capacitor 281, 282, 283, 284 are protected from thermal stress, vibration and the like.
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