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<http://webisa.webdatacommons.org/304669105>	<http://www.w3.org/ns/prov#value>	"The ordinary type adopts Chinese PCD as its blade, while the super-strong type adopts American blade made by GE. Choosing proper type makes high ratio of performance and price. 73-F18 Spiral drill pipes /twist drill rod for coal mining Our PCD drill bits are widely used in all industries, such as coal mining, oil exploration, geological exploration, water and hydroelectric, railway and road, tunne" .
<http://webisa.webdatacommons.org/304669105>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<alibaba.com> .
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