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Yasuyuki Oyamada
FUKUOKA, JP
1. 20090129908 Arm for Excavation Machine - object of the present invention is to reduce manufacturing cost and manufacturing man-hour of an arm constituting a working 05-21-20092. 20090104011 Excavation Machine - objective of the present invention is to provide a counterweight of a power shovel interchangeable with that of a superordinate 04-23-2009
3. 20090078667 Boom for Excavation Machine - boom 15 for a working machine 10 attached to an upper rotational body 30 supported on a center of an upper portion of a 03-26-2009