In an automatic leveling apparatus, a motor inclines an optical axis of a headlamp in an up and down direction relative to a vehicle body, a vehicle height sensor detects a change in a height direction of an axle portion of a front wheel or a rear wheel of a vehicle, and an involatile memory records a control constant inherent to the vehicle. The vaccine commonly includes inactivated EHV-1 and an adjuvant. The tab member is separately formed from the leaflet. The second refractory metal material has a lower affinity for the impurities than does the first refractory metal material. Content request and content download occur over a computer network, such as the Internet.