Đồng hồ đo lưu lượng khí gas Shinagawa W-NKDa
S type gas meter is a Reference Standard gas meter certified by the Japanese government as conforming to the Japanese Measurement Law. A specified manufacturer license is required to use this in Japan, but such a license is not necessary for overseas use. If used as a Reference Standard meter outside Japan, please ensure that local standards are compatible with Japanese standards, or have the meter certified by local authorities.