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目前KAM-500型钻机上使用的50提引水接头和KA-2M-300型钻机上使用的42普通水接头,均不够耐用,修理也比较麻烦,特
At present, the KAM-500 drilling rig used on the 50 to mention the water connector and KA-2M-300 drilling rig used on 42 ordinary water joints are not durable enough, the repair is too much trouble, special