| |||
master valve (andrushin); upper master (MichaelBurov); upper master valve Xmas (UMV MichaelBurov); UMV (upper master valve Madi Azimuratov) | |||
master valve lower, upper (нижняя, верхняя) | |||
master valve |
центральная задвижка: 4 phrases in 2 subjects |
Oil and gas | 2 |
Sakhalin | 2 |