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API Oilfield bits ke ea ho cheka seliba se tebileng ka theko e theotsoeng
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Botlolo ea konopo ea "Oilfield API" ka theko e theotsoeng setokong
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Oli e entsoeng ka thata ea trione bit bakeng sa ho cheka seliba se tebileng
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Feme ea API ea rabara e tiisitsoeng e nang le lirolara tsa oli ea ho cheka
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China API fektheri ea oli e tebileng hantle hanyane bakeng sa lefika le thata
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API feme ea khase ea tlhaho ea trione rock drilling bit