短語(yǔ)詞組短語(yǔ)gravity waste dam 重力式垃圾垻gravity arch dam 重力拱垻gravity spillway dam 重力溢流垻gravity hollow dam 空腹重力垻gravity overflow dam 溢流重力垻gravity conjunction dam 重力垻hollow gravity dam [水利]空腹重力垻;[水利]空心重力垻profile of gravity dam 重力垻剖麪Longtan RCC Gravity Dam 龍灘碾壓混凝土重力垻 返回 gravity dam