| 摘要 |
FIELD: geological exploration. SUBSTANCE: device includes agent supplying pipe with dosing unit with dropped balls in upper portion. Seats with inclined channels are secured to the internal surface of the agent supplying pipe. Channel axes are displace from the axis of agent-supplying pipe. As this takes place, seat channel axis and agent supplying pipe axis are not parallel and not intersected. EFFECT: higher efficiency. 1 cl, 3 dwg |
