1.3.the unswept remaining owing to development of non-proportionably each substratums in a series of strata.
③层系内由于各小层物性差异开采不均衡未波及剩余油。
2.12 That such things as cannot be divided the enjoyed in Common if it can be; and if the quantity of the thing permit without Stint; otherwise Proportionably to the number of them that have Right.