Polyurethane sealing ring ditondoi dening nyandhang resistance, lenga, asam lan alkali, ozon, tuwa, suhu kurang, tearing, impact, etc. Polyurethane sealing ring nduweni kapasitas ndhukung mbukak gedhe lan digunakake digunakake ing macem-macem kothak. Kajaba iku, dering sealing cast tahan minyak, hidrolisis ...
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