单词	瓦管排水
释义	瓦管排水 tile drain
随便看	derivation of value added derivationof water derivation of word-forms derivation of word sense Derivation on Infinite Matrix Rings derivationpareto derivation polynomial symmetric interpolation derivation principle derivation process derivation regulating action derivation rule derivative derivative absorption spectroscopy Derivative absorption spectrum derivative accounting convention derivative accumulation derivative AC polarograph derivative acquisition derivative action derivative ac-tion derivative action coefficient derivative-action coefficient derivative action control derivative action controller derivative action factor