词汇	oil-pneumatic spring
释义	oil-pneumatic spring 油气弹簧
随便看	problem of the origin of the protein problem of thermal balance problem of three bodies problem of timing problem of training problem of transformation problem of triple system problem of tsp problem of tuition problem of two bodies problem of two fixed centers problem ofunemployment problem of unemployment problem of value determination problem of visual accommodation problem of wages determination Problem on country economy problem on lattice point problem oriented medical record problem-oriented medical record problem on obstacle problem onset text problem on the early precambrian cratons Problem on which to work problem organization of research