关于gullies的百科

• gullies造句怎么写

• Roadsidegulliesarenormallyclearedmanuallyonceeverytwoweeks.Theexistingnaturalgulliesandvalisesshallbeplanedtoensuresmoothflowingofwater,thebedofgulliesaretobepavedifnecessary.Volcanicmudflows(lahars)poureddownriversandgulliesaroundtheintactflanks.Aco...
• 2017-05-279920