... HRW21CR HRW27CR HRW35CR THK, RSR type in cross roller guide and linear rolling unit limited stroke type, ... . Therefore, and parallel use a pair of straight line roller liner, compared to achieve a more compact knot made ... fixed load, the ball was designed to 45 ° line up of the antenna, and of course use what ... fixed load, the ball was designed to 45 ° line up of the antenna, and of course use what ...