To be provided is a construction machine capable of effectively reducing noise which would intrude into a cab, without deterioration in ride quality, comfort and air-conditioning efficiency in the cab. The construction machine comprises a lower propelling ...

The present invention provides a master tire for inspecting the accuracy of a tire tester easily and securely. A master tire 100 according to the present invention is equipped with an upper-lower rim member 120, a cylindrical member 110 equivalent to the t...

A hydraulic traveling vehicle includes: an engine; wheels; a wheel shaft connected to the wheels; a hydraulic pump driven by the engine and thereby discharging a hydraulic oil; a first hydraulic motor and a second hydraulic motor actuated by a hydraulic pr...

The invention relates to a management system for construction machines. The system comprises a construction machine and a management center allowing transmission and reception of control information between these components. The management system includes ...

A titanium material of the present invention includes a base material composed of a titanium alloy containing at least one alloying element selected from the group consisting of gold, silver, and platinum group elements; and a concentrated layer integrally...

A sound-absorbing structure body according to the present invention comprises a ridge-groove board (11) formed with a large number of ridges and grooves, a closing board (15) joined to the ridge-groove board so as to close one side of the ridge-groove boar...

A hood structure comprises an outer and an inner which form a closed cross section through spaces. The inner's cross-sectional shape is a sine curve, an nth-power-raised sine curve, or a spline curve having a corrugation length approximate to an outside he...