The present invention provides a method of joining members to be joined by use of an Au\u2014Sn brazing material, in which joining is performed by adjusting the composition and thickness of the Au\u2014Sn brazing material so that the Sn content of the joint after joining is from 20. The method includes the following: setting a gravitational force threshold for operation of the vehicle; measuring a g-force onboard the vehicle; and conveying to an operator of the vehicle that operation of the vehicle has resulted in the measured g-force exceeding the g-force threshold. The invention also relates to the use of 17\u03b1-alkyl-17\u03b2-oxy-estratrienes for the production of pharmaceutical agents as well as pharmaceutical preparations that contain at least one 17\u03b1-alkyl-17\u03b2-oxy-estratriene as well as at least one pharmaceutically compatible vehicle. At this time, since the outer section of the diaphragm is engaged with the scope joint, the diaphragm and TV camera unit can be turned relative to an objective optical system and relay optical system with the optical axis of the relay optical system as an axis of turning.