THE 5-SECOND TRICK FOR CONTOUR SURVEY IN DHAKA

Launch the clamp screw of your instrument, hold the instrument in the appropriate hand, and repair it within the tripod by rotating only the decreased section Along with the still left hand. Tighten the screws of the instrument firmly.আমরা সারা বাংলাদেশে আমাদের সার্ভিস প্রদান �