The utility model belongs to a fitting of an internal combustion engine filter, in particular to a novel spin-on filter casing capable of easily loading and unloading.
本实用新型属于一种内燃机滤清器配件，新型易装卸旋装滤清器 外壳。
The external non liner loading of well casing can be improved by changing elastic parameters of the cement mantle.
水泥环的弹性参数和泥岩含水量等对套管外载有一定影响。
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