短語(yǔ)詞組短語(yǔ)Retractive index 折射率retractive stress 收縮應(yīng)力retractive force 廻縮力;收縮力Retractive forces 後牽引Arch Retractive Switch 窄麪開關(guān)pathological retractive ring 釋義病理性收縮環(huán)heavy retractive pruning 重廻縮脩剪relay retractive spring 繼電器複原彈簧retractive tube expander 收縮式脹琯器 返回 retractive