水平传播

带有REV-LTR片段的马立克氏病病毒重组野毒株与超强毒株致病性和横向传播性比较

carbonization plant with horizontal chamber

fractionating column with horizontal grids

farmyard manure spreader with horizontal roller

horizontal line of sight

horizontal honing machinne

horizontal multi-stage centrifugal pump

multi-desk conveyer, horizontal conveyer, vertical conveyer

large-type horizontal metallurgical microscope