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阻水帶
應用于通信光纜，起到密封、防水、防潮和緩沖防護作用。其具有膨脹壓力高，膨脹速度快，凝膠穩定性好以及熱穩定性好等特點，防止水和潮氣縱向蔓延，從而起到阻水作用，保證了光纖的傳輸性能，延長了光纜壽命。
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