Category of engineering blasting

Engineering blasting refers to various types of blasting operations for the purpose of constructing, rebuilding, expanding, and acquiring rock ore or other products. Blasting in mining, iron road, transportation, chemical industry, construction, utilities and underground engineering and other depart

Introduction to molybdenum

Molybdenum is one of a refractory metal element in the periodic table of elements of group VI B, atomic number 42, atomic weight 95.94. 1778 Swedish chemist CWScheele molybdenite decomposition with nitric acid which found a new element, which Named molybdenum (molybdos). In 1782, the Swedish chemist