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About product and suppliers:
        Alibaba.com offers 67 450mm long diamond core drill bits products. About 80% of these are drill bit. 

A wide variety of 450mm long diamond core drill bits options are available to you, such as diamond, high carbon steel. You can also choose from masonry drilling, metal drilling. As well as from free samples, paid samples. 

There are 67 450mm long diamond core drill bits suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 450mm long diamond core drill bits respectively. 

50mm long diamond core drill bits products are most popular in Mid East, South America, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 18 with ISO9001, 3 with Other, and 2 with OHSAS18001 certification.
        
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