共搜索到22361条信息,每页显示10条信息,共2237页。用时:0小时0分1秒953毫秒
forces from rock blocks. Cutters today can either incorporate hard, fine grained carbides into the matrix of the disc material or apply a hardened coating of alloy powder on the steel substrate... are more crack and wear resistant by the use of flex-acceptable materials and welding techniques. Based on a detailed geotechnical baseline report, the cutterhead design can be optimized by conducting......