Ngaphantsi kwemeko eqhelekileyo yokusebenza, i-valve yokukhangela ekhitshini kufuneka imelane nokwahlukana koxinzelelo lokuvula lwe-300pa, emva kwe-10,000 yokuvula nokuvala imifuniselo. Kule nkqubo, akufuneki kubekho i-valve piece shed, i-deformation kunye nomonakalo ochaphazela ukusebenza kokutywinwa, kwaye iqhekeza levalve kufuneka liguquguquke kwaye lithembeke.

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