Polybutylene terephthalate (PBT) waa balaastiig injineernimo heer sare ah. Waxay leedahay habayn heer sare ah, cabbir xasiloon, dhammayn wanaagsan oo dusha sare ah, iska caabbinta kulaylka aad u fiican, caabbinta gabowga iyo iska caabbinta daxalka kiimikaad, sidaa darteed waa ext ...
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