词汇	gravity line
释义	gravity line 自流管,重力导管
随便看	location of Shanxi Location of solid/liquid interface location of source location of speciality location of stamping location of stock location of stowage location of substations location of supermarkets location of survivor location of table at coordinates location of talented person raising location of tank location of Tan Kingdom location of TDOA location of terminal site location of the ancestral location of the best view location of the core location of the diffuser location of the fiber unit location of the function location of the logistic center location of the machine to be installed location of the main vortex