短語詞組短語perforated -plate column 多孔管分布器column perforated -plate 鉆孔板柱perforated baffle plate 多孔導流板perforated thin plate 開孔薄板perforated retaining plate 穿孔護片perforated sheet plate 開孔薄板perforated metal plate 金屬濾片;板網(wǎng) 返回 perforated plate