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地质钻杆杆体采用地质专用合金钢管(R780、DZ50),地质钻杆钻头采用优 金结构钢(42CrMo)经真空调质处理,大大提高了抗疲劳强度和抗剪切强度
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优质42地质钻杆煤钻杆探水钻杆锥丝钻杆73锥丝钻杆厂家直销 桓业机械厂家直销 大量出货
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10000根可售
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10000根可售
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10000根可售
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