Hoʻokumu ʻia nā mea hana damper Spring Return no ka hoʻohana ʻana i ka ea damper maʻamau, rotary valve a me nā mea hana ʻē aʻe e koi ana i kahi hana palekana-palekana.I ka hana maʻamau, hoʻokele ka mea hoʻokele i ka mīkini.Inā pau ka mana, e hoʻi ka mea hana i kona kūlana mua.
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