Random good picture Not show

91. LD is an acute bacterial infection of the lower respiratory tract ( bacterial pneumonia ).

92. Sapphire is also the most ideal substated material for LED and LD.

93. Control models on LD convener have been optimized and developed, to make control model suitable to new steel - making technics.

94. In the paper, the underwater repair technique for double insulation pipe is introduced based on the underwater repair project of sub-sea pipeline in Weizhou oil fie ld.