How to calculate the tube length--Chenxin

Due to descript of tube length are not same by different customer,
In order to avoid the make a mistake and exactly descript the customer message turn to our company message, we make a unify form for test.
Visual tube length: outside of tube length
Total tube length: Mean net tube length, need to pull out measurement the tube length
FBOG tube length: mean the tube length is from the gasket

For example
If get the message of total tube length, Visual tube length=net tube length-9mm
If get the message of FBOG, Visual tube length=FBOG-63mm-9mm+2mm
If get the message of bottle length, Visual tube length=Bottle length -63mm-9mm+2mm

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