Piping Engineering : Bolting method of various type butterfly valves

[@marouansaiden6701]

Awsome video. Thanks a lot

[@664662]

Thanks! very helpful, even if the music is really creepy :D

[@jeyabal4598]

very useful, thanks

[@sen-ow7ub]

Hope this video will be more clear if you explain it once again with practical explanations explain it through your verbally

[@maryanngatmaitan5477]

magkanu ang isa ganyan klase