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封口盘
释义
封口盘
Encyclopedia
工学
凿井设施
释
shaft cover platform
封口盘
凿井时,设置于井口地面上、覆盖井筒掘进直径的可承载平台。又称井盖。
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paper book
paperbound book
paper casting method
paper chart publishing system
paper chemicals
paper chromatography
paper clock
paper coating
paper-coloring (with bark of the cork tree)
paper culture experiment
paper currency
Paper Currency “Jiao Chao”
paper-cut film
Paper Cuts
paper cutting device
paper deacidification
paper dielectric materials
paper document
paper dragon
paper electrophoresis
paper feeder device
paper folding
paper folding constant
paper-folding film
paper grammage
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更新时间:2026/10/23 5:32:28