DEVELOPMENT AND APPLICATION OFd30 mm AND d32 mm DRILL HEADS
Liu Rongxiang ; Yi Kaihua ;Pei Xitao ;Wang Wenzhao;
Transactions of Nonferrous Metals Society of China ›› 1994, Vol. 4 ›› Issue (03) : 106-107.
DEVELOPMENT AND APPLICATION OFd30 mm AND d32 mm DRILL HEADS
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