Portable stress instrument S-18
Measuring PS plastic (PS) products shall be used when spectrum lights and sodium lamp.
A standard S-18 includes a light source, one containing a 1/4 wave plate parser and another with a 1/4 wave plate of polarizing device. Testing the force that press a gram and glass products, need to be in the optical instruments into a piece of the extra wave plate.
The lid of the upper instrument can take away. This makes the whole wave plate inserts and remove all is easy, and easier to overhaul light so
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01/22 23:50