Conversion of River Sand into Fine Aggregates in BOQs of Works Contracts – Public Comments
ගංගා වැලි වෙනුවට ආදේශක වැලි (Fine Aggregate) ඉදිකිරීම් ප්රමාණ බිල්පත්වලට ඇතුළත් කිරීම – මහජන අදහස්
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