Ko ngā waea TW/THW he waea parahi totoka, he taura rānei, he ngohengohe kua whakamahanatia ki te Polyvinylchloride (PVC).
Ko te waea TW he tikanga mō te waea kirihou wera, ātete-wai.
He waea kirihou-wera anō hoki te waea THW, he ātete wai, engari he ātete wera, e tohuhia ana e te H i roto i te ingoa.


Tukuna he Īmēra


