| бур. |
lightweight drill pipe (MichaelBurov); light alloy drillpipe (MichaelBurov); LWDP (MichaelBurov); lightweight drillpipe (MichaelBurov); light-alloy drillpipe (MichaelBurov); lightweight drill-pipe (MichaelBurov); light alloy drill pipe (MichaelBurov); lightweight DP (MichaelBurov) |
