These microscopic plants, commonly observed as a brown skin coating submerged stones in rivers and lakes and as phytoplankton in seas and oceans, typically contain oil droplets inside their cells.
A corporate tax rate of 9% except for the exploration and exploitation of natural resources, timber, oil, mines, gold, and precious stones which shall be set in separate laws.
9%的公司税税率，专门法律设定的自然资源，木材，石油，矿山，黄金及宝石的勘探和开采除外。
3
The flexibility agent of oil-well cement mixed with short fibers can improve the inherent fragility of oil-well cement stones obviously and increase the flexibility of cement mantle greatly.