单词	concentric lens
释义	concentric lens 同心透镜
随便看	round pile stacker blank round pile stacker blanksheet round numbers round nut round nut box spanner round nuts Round nuts with drilled holes in one face Round nuts with set pin holes in side Round Nuts with Side Holes round nut with drilled holes in one face Round nut with drilled holes in side round nut with grooves round nut with lateral notches round nut with lock channel Round Nut with Set Pin Holes Inside round nut with set pin holes in side roundo round O round of ammunition round of applause round of applauses round of beam round of bearings round of beef round of bilge