Boron Nitride Evaporation Boat for metalizing machEvaporation Boat : (1)Standard: 110×16×9,110×20×10,105×20×10,120×24×10,110×26×10,130&time
Silicon Nitride Riser Tube For Low Pressure CastinSilicon nitride is the hardest substances in the world because of its high intensity, especially the silicon nitride by hot pressing. It can stand up
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