In order to analyze the attenuation law of blasting vibration wave through the damping groove. and to explore the function relations between the damping groove depth and damping effect of affiliation; the discussion about the blast hole millisecond firing initiation technique is based on the numerical simulation analysis software ANSYS / LSDYNA; in the process of explosion. vibration ... https://parisnaturalfoodes.shop/product-category/goldenseal-tincture/