LAND SURVEYING SERVICES BANGLADESH NO FURTHER A MYSTERY

ফেইসবুক পেইজ ভিজিট ও লাইক দিন। মাননীয় উপদেষ্টাRamsden's theodolite represented a terrific action ahead while in the instrument's precision. William Gascoigne invented an instrument that utilised a telescope by having an mounted crosshair as being a goal gadget, in 1640. J