Pneumatic wafer soft seal butterfly valve compact structure, 90° rotary switch faigofie, faʻamaufaʻailoga faʻatuatuaina, umi le ola tautua, e faʻaaogaina lautele i vai, fale eletise, uʻamea uʻamea, fai pepa, vailaʻau, meaʻai ma isi faiga i totonu o le vai ma alavai, e pei o tulafono faatonutonu ma le faʻaaogaina o le tipi. O le p...
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