@siu-hung Hung Thank you for your info. Ampex Ferrotec workers made parts for the American military and the microscopic type of work was a controlled know-how that really had fine coated copper threads going through ting magnetic beads, not bonding at all. One missile fired in Vietnam, one set of such device was gone. This designated factory was in CheungShaWan, close to MeiFoo, never had any outsourcing because it could not be done without microscopes.
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