Ukukhuluma ngemikhiqizo yehadiwe yomhlobiso wasekhaya, kufanele sisho ama-valves. Njengomphimbo "wepayipi", i-valve idlala indima ebalulekile ekushintsheni kwamapayipi, ukulawula ukuqondiswa kokugeleza, kanye namapharamitha okuguqula. Impilo yasekhaya, amapayipi amanzi, amasistimu wokushisa phansi, i-liquefied ...
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