| 摘要 |
FIELD: mining.SUBSTANCE: claimed device comprises the tubular case, illuminator and imaging device arranged in said case. There are fluid circulation channel and sprayer to force fluid circulating in one circulation channel onto transparent cover. The latter provided the illumination and imaging. Flexible pipe for service lines features the required twist stiffness and centring elongated element gets deformed at the applied force and featured the shape memory Said element has tip sector, bottom sector and two bends in opposite directions at the central section. Note here that tip sector can stay in contact with the borehole wall. Note also that the bottom sector can stay at the borehole centre.EFFECT: higher safety and efficiency of blasts.15 cl, 6 dwg |
