Presenting either threadiness or pinnate distribution in space;
空间上呈线状或羽状分布；
North American evergreen fern having pinnate leaves and dense clusters of lance - shaped fronds.
具有羽状叶片和成群长矛状复叶的一种北美常绿蕨类。
Genus of chiefly tropical American shrubs and trees having pinnate leaves and red or white flowers.
长有羽状叶子和红白花的主要在美国热带的灌木和乔木的属。
North American perennial with hairy basal pinnate leaves and purple flowers and plume - tipped fruits.
北美洲的一种多年生植物，具有多毛的羽状基叶，紫色的花朵，果实顶端有宿存的羽毛状花柱。
Slender, tilted trunk with ring marks, tree top the FuYe born great pinnate, forming a beautiful crown.
树干细长，倾斜，具环痕，树顶著生巨大的羽状复叶，形成优美的树冠。
Genus of old world herbs having pinnate leaves and pink or whites racemose flowers followed by flat unjoined pods.
长有羽状叶子和粉的或白的总花状序的花，结有扁平的旧大陆的草本属。
West Indian locust tree having pinnate leaves and panicles of large white or purplish flowers; yields very hard tough wood.
西印度群岛的一种角豆树，有羽状的叶片和开白色或紫色大花的圆锥花序，木材。
Large erect shrub of Columbia having large odd-pinnate leaves with large leaflets and axillary racemes of fragrant yellow flowers.
哥伦比亚一种高大挺直的灌木，有带大型小叶的奇数羽状的大叶和开芳香黄花的腋生的总状花序。
The directional pinnate horizontal multilateral well has been a rising technology in recent years for increasing coalbed methane recovery.
定向羽状水平井技术是近几年兴起的一项煤层气地面抽采技术。
Brazilian shrub having twice-pinnate leaves and small spicate flowers followed by flat or irregularly torulose pods; sometimes placed in genus Piptadenia.
巴西的灌木，有两倍羽状的叶子和小的有穗的花，有平的不规则的豆荚；有时被归为南美豆属。
A mathematical model for describing coalbed gas recovery in heterogeneous anisotropic dual medium of pinnate horizontal multilateral Wells was established.
建立了对非均质各向异性双重介质煤层气进行定向羽状水平井开采的数学模型。
The result of simulation showed that the gas production in low-permeability coal bed could increase greatly by drilling pinnate horizontal multilateral Wells.
计算结果表明，利用定向羽状水平井能够大幅度提高低渗透煤层气的开采效率。
The existence of start-up pressure gradient can make depressurization effect of pinnate horizontal multilateral well get worse, which promotes gas production reduced.
启动压力梯度的存在会使煤层中羽状水平井的降压效果变差，从而减少煤层气的产量。
Making use of horizontal pinnate branch well to develop and utilize coal seam gas, is a new drilling technique, which is different from horizontal drilling and has its own uniqueness.
利用水平羽状分支井来开发利用煤层气，是一项新的钻探技术，它有别水平钻井，有其独特性。
Making use of horizontal pinnate branch well to develop and utilize coal seam gas, is a new drilling technique, which is different from horizontal drilling and has its own uniqueness.
利用水平羽状分支井来开发利用煤层气，是一项新的钻探技术，它有别水平钻井，有其独特性。
应用推荐