Four kinds of self-made non-standard drilling tools

Four kinds of self-made non-standard drilling tools[J]. MW Metal Cutting, 2009, (23): 36-37,42.

Citation:

Four kinds of self-made non-standard drilling tools[J]. MW Metal Cutting, 2009, (23): 36-37,42.

Citation:

Four kinds of self-made non-standard drilling tools[J]. MW Metal Cutting, 2009, (23): 36-37,42.

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