Abstract: To achieve an elastic wave element with excellent electrical characteristics. An elastic wave resonator includes a piezoelectric substrate including a piezoelectric body and an IDT electrode, a support substrate, and a first intermediate layer. In the first intermediate layer, an atomic ratio of a metal element is larger than an atomic ratio of a metal element in the piezoelectric body, and an atomic ratio of oxygen is smaller than an atomic ratio of oxygen in the piezoelectric body. A thickness of the piezoelectric body is equal to or less than five times a maximum pitch of electrode fingers of the IDT electrode.

Abstract: A cab capable of shielding solar radiation comprises a pair of front pillars and a pair of vertical beams; a front window glass member mounted movably along guide rails formed along the front pillars and the vertical beams, between a closing position for closing a front window formed between the front pillars and an opening position for opening the front window accommodated between the vertical beams; a roll screen and a winding member, wherein the winding member is disposed behind the inner surface of the front window glass member positioned at the closing position and in front of the front end of the front window glass member positioned at the opening position and on the outer side of the pair of guide rails; and a holding means attached to the front pillars and configured to releasably hold the leading end of the screen.

Abstract: To provide a cab for construction machine capable of shielding at least a part of the solar radiation entering from the front window at any time of closing or opening a front window.