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1. Leaves alternate, palmate or 3-foliolate, rarely pinnate.

2. Conclusion Ulnar compartment and radial compartment are half pinnate muscle, the force produced by ulnar compartment is more 1 times than radial compartment.

3. Pinnate horizontal multilateral well is an emerging stimulating technology in recent years.

4. The process of mine gas pre-draining by pinnate boring was simulated with VB6.0 codes.

5. Leaves are usually pinnate or palmate, and differ enormously in size at maturity, sometimes reaching a length of about 25 m.

6. The leaves are usually compound and pinnate, with stipules .

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7. The directional pinnate horizontal multilateral well has been a rising technology in recent years for increasing coalbed methane recovery.

8. North American evergreen fern having pinnate leaves and dense clusters of lance - shaped fronds.

9. North American perennial with hairy basal pinnate leaves and purple flowers and plume - tipped fruits.

10. The technique of directional pinnate horizontal wells, which joints the drilling, completion and stimulation jobs together, adapts to exploit coal-bed gas with low permeability.

11. Eurasian plant(Foeniculum vulgare) having pinnate leaves, clusters of small yellow flowers grouped in umbels, and aromatic seeds used as flavoring.

12. North American herb with bitter - tasting pinnate leaves resembling those of tansy.

13. 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.

14. It will be the important technique in 21th century with the developments in petroleum field, after the technology of pinnate wells and horizonal wells are developed in 20th century.

15. The existence of start-up pressure gradient can make depressurization effect of pinnate horizontal multilateral well get worse, which promotes gas production reduced.

16. Genus of chiefly tropical American shrubs and trees having pinnate leaves and red or white flowers.

17. The result of simulation showed that the gas production in low-permeability coal bed could increase greatly by drilling pinnate horizontal multilateral wells.

18. A mathematical model for describing coalbed gas recovery in heterogeneous anisotropic dual medium of pinnate horizontal multilateral wells was established.

19. According to the economic evaluation, it has better economic benefit to exploit Qinshui coal-bed gas field with directional pinnate horizontal wells.