He aha te arai mono valve?Ko te reera mono he momo takirere e whakamahi ana i te mono, i te obturator ranei, hei whakahaere i te rere o te wai i roto i te paipa, i te awaawa ranei.Ka whakaarahia, ka whakahekehia ranei te mono ki roto i te tinana takirere hei whakatuwhera, hei kati ranei i te rere o te wai.Kei te whakamahia nga marere mo te arai...
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