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In fact,an anecdote re: ph of coolant.
A series of critical rms billet baseplanes failed xray.
Etching of sufaces by contaminated coolant theatened a ceasework.
BirdCol. came into the shop the next week gave a greenlight.
Tre expensive lesson,maintain thy machine.
Cause:Ignorant former employee was dumping into the machines with lunch discards.
2500 a barrel for http://jokisch-fluids.de/..
For our application the global standard.
100% control,each employee was required to endorse a waiver.
2000gal tank farm for filtration+temp control.
Solved the problem at massive expense to maintain delivery sheds.
Heat-treat bookings were made 10mo ahead.
TicToc.
http://www.matsuura.co.jp/
http://www.cinmac.com/
http://www.nakamura-tome.co.jp/e/
At that time '80-'91.
Just one question.....what color is the sky on your planet?