Emva kokuhlolwa okungqongqo komgangatho, ipleyiti yokucoca iPP (ipleyiti engundoqo) ithatha ipolypropylene eyomeleziweyo, enokuqina okuqinileyo kunye nokuqina, iphucula ukusebenza kokutywinwa kokutywinwa kunye nokumelana nokubola kwepleyiti yokucoca, kwaye i-diaphragm ithatha umgangatho ophezulu we-TPE elastomer, enomgangatho ophezulu. ..
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