基本解釋礫石充填英漢例句雙語例句Productivity Ratio(PR) is firstly put forward to evaluate the effect of gravel-packing sand control measure on gas well productivity.提出了以防砂産能比作爲防砂措施對氣井産能造成影響的評價指標。Packing can be made from wide range of commercial and home made materials-steel, wool, wood chips, coke, gravel etc. Gas is passed through bottom and removed at top.包裝可從商業(yè)和自家做的各種材料，鋼材，羊毛，木屑，焦炭，礫石等氣躰是通過底部和頂部刪除。www.tech-domain.comIncipient motion of solid grain in solid-liquid two\phase flow is often concerned in many petroleum technologies, such as horizontal drilling, gravel-packing and sand washing.水平井鑽井、礫石充填及沖砂等作業(yè)都涉及到固液兩相流動的固躰顆粒起動問題。gravel packing更多例句詞組短語短語horizontal gravel -packing 水平井礫石充填gravel -packing sand-control 充填防砂area of gravel -packing 充填區(qū)high -pressure gravel-packing and sand-preventing 高壓礫石充填flow -type gravel packing 循環(huán)式礫石充填gravel packing更多詞組專業(yè)釋義能源科學技術礫石充填地球科學圍填