Effects of the Austenite Grain Size and Deformation in the Unrecrystallized Austenite Region on Bainite Transformation Behavior and Microstructure von Yamamoto, Sadahiro, Yokoyama, Hiroyasu, Yamada, Katsumi, Niikura, Masakazu

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Development of Anti-Darkspot Bainitic Steel Rail von SATOH, Yukio, TATSUMI, Mitsumasa, KASIWAYA, Kenji, UEDA, Masaharu, YOKOYAMA, Hiroyasu

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VIBRATION AUXILIARY DEVICE AND CONSTRUCTION METHOD von KATO TSUTOMU, NAGABUCHI KAZUYUKI, YOKOYAMA HIROYASU

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PILE DRIVING/EXTRACTING MACHINE AND METHOD OF DRIVING/EXTRACTING PILE von YOKOYAMA HIROYASU

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BRAKE DEVICE FOR CHUCK OF PILE-PUNCHING MACHINE von YOKOYAMA HIROYASU

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LOW EMPTY HEAD TYPE PILE PUNCHING MACHINE EASY FOR CONTROLLING PILE POSTURE von YOKOYAMA HIROYASU

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APPARATUS FOR MANUFACTURING SEAM-WELDED PIPE EXCELLING IN WELDED PORTION CHARACTERISTIC von OKABE, Takatoshi, KENMOCHI, Kazuhito, SHIROSAWA, Hiroyuki, SAWAKI, Tetsuro, SUGIMOTO, Yuji, YOKOYAMA, Hiroyasu, KOIDE, Tatsuo, INOUE, Tomohiro

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TUBULAR OBJECT ULTRASONIC TEST DEVICE AND ULTRASONIC TEST METHOD von IIZUKA, Yukinori, SAKASHITA, Shigeto, KENMOCHI, Kazuhito, YOKOYAMA, Hiroyasu, INOUE, Tomohiro

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CHUCK DEVICE FOR STEEL PIPE PILE HAVING ALIGNING FUNCTION von YOKOYAMA HIROYASU, INOUE TOSHIO

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PILE CONSTRUCTION METHOD, MANIFOLD DEVICE, AND MANIFOLD DEVICE DESIGN METHOD von SUZUKI Yukichi, TAKAHASHI Hironori, KITAMURA Takuya, MORIYASU Shunsuke, KUBOTA Kazuo, YOKOYAMA Hiroyasu, KATO Tsutomu, MOROHASHI Yohei, OHMORI Takamitsu, TAKENO Masakazu

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CHUCK CONTROL METHOD FOR PILE AND THIS DEVICE von YOKOYAMA HIROYASU

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METHOD FOR CONTROLLING QUALITY OF TUBULAR BODY AND TUBULAR BODY MANUFACTURING METHOD von IIZUKA, Yukinori, SAKASHITA, Shigeto, KENMOCHI, Kazuhito, YOKOYAMA, Hiroyasu, INOUE, Tomohiro

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DEVICE AND METHOD FOR MEASURING DYNAMIC BEARING FORCE DURING PILE DRIVING von KATO TSUTOMU, MORI TAKUTO, NISHIMURA SHINJI, KITAMURA TAKUYA, YOKOYAMA HIROYASU

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Development of Bainitic Steel Rail with Superior Shelling Resistance von Yokoyama, Hiroyasu, Mitao, Shinji, Yamamoto, Sadahiro

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Pile construction method, manifold device, and manifold device design method von SUZUKI, Yukichi, MOROHASHI, Yohei, KUBOTA, Kazuo, TAKENO, Masakazu, KATO, Tsutomu, MORIYASU, Shunsuke, TAKAHASHI, Hironori, KITAMURA, Takuya, OHMORI, Takamitsu, YOKOYAMA, Hiroyasu

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Pile construction method, manifold device, and manifold device design method von SUZUKI, Yukichi, MOROHASHI, Yohei, KUBOTA, Kazuo, TAKENO, Masakazu, KATO, Tsutomu, MORIYASU, Shunsuke, TAKAHASHI, Hironori, KITAMURA, Takuya, OHMORI, Takamitsu, YOKOYAMA, Hiroyasu

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VIBRATING PILE DRIVING AND DRAWING MACHINE von NAGABUCHI KAZUYUKI, YOKOYAMA HIROYASU

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MUDDY WATER THICKENING METHOD AND MUDDY WATER THICKENING PUMP APPARATUS von YOKOYAMA HIROYASU

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METHOD AND DEVICE FOR DAMPING OSCILLATION OF GROUND von SUZUKI YUKICHI, YOKOYAMA HIROYASU

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REVERSIBLE ROTATION MECHANISM OF ECCENTRIC WEIGHT TYPE VIBRATION GENERATOR von SUZUKI YUKICHI, YOKOYAMA HIROYASU

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