How to drill the long electric heating pipe hole of the brake pad mold? deep hole drill, brake pad mould factory

(1) JNHG is a professional brake pad mold factory,
(2) For long holes with a depth of more than 200mm, deep hole drilling is required
(3) The longest drilling depth is 2000mm
(4) Gun drill bit, strictly guarantee the drilling accuracy
(5) Applicable to the following molds:
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