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In a NOx selective catalytic reduction device that purifies NOx in exhaust gas exhausted from an engine, a urea water supply system is constructed of a urea water injection valve, a urea water tank, urea water supply piping and a urea water supply device, a connection frame member is provided on a r...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | In a NOx selective catalytic reduction device that purifies NOx in exhaust gas exhausted from an engine, a urea water supply system is constructed of a urea water injection valve, a urea water tank, urea water supply piping and a urea water supply device, a connection frame member is provided on a revolving superstructure to extend in a longitudinal direction in a center in a width direction to reinforce the revolving superstructure and to be located between a pair of main frame members that connects a working device so that a rear side faces the engine, the urea water tank is placed on the revolving superstructure on a front side from a center of revolution of the revolving superstructure, the engine is placed on the revolving superstructure on a rear side from the center of revolution of the revolving superstructure, and the urea water supply device is installed on the connection frame member to face the engine. |
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