haulage roadway造句
Theapplicationofboltingspoutingsupportin7244haulageroadwayofnorthNo4miningareaTheapplicationofthegeologyminingconditionandthegob-sideentrysupporttechnologyinhaulageroadwayNo.451faceareintroduced....
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haulage造句
Thelocalhaulageassociationwantshighwayrest-stopstobereopenedtoallowdriverstotakethebreaksrequiredofthembylaw.Theelevatordesignhasusedthehaulagetypetransmissionandnegativestrengthcontroltechnology,thee...