1, he maamaa te hanganga taputapu pneumatic, he maamaa, he ngawari ki te whakauru me te pupuri.Ko te reo he hau, ehara i te mea ngawari ki te tahu ki te reo hydraulic, na reira he haumaru te whakamahi.2, ko te reo mahi he hau korekore, ko te hau ake e kore e utu moni.He ngawari te maimoatanga o te ngongo, kaore e poke ...
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