The present invention relates to a fluid conduit, and to a multi-conduit umbilical for use in the transportation of chemicals with small molecular size and shape e. The wave spring and the snap ring share the axis with the circular member. The ultrasound data is stored in an ultrasound system readable format. The extracted source rock, the twice-extracted source rock, and the first and second extracted petroleum may be analyzed to determine the characteristics and properties of the reservoir rock. The speaker supporting device is a structure which supports a speaker mounted in a case, and comprises a main body part which covers a wiring board disposed inside the case, and a mounting part which is formed in this main body part, and on which the speaker is mounted.