Do you have a central operation organization above the property level?
在公司上层是否有中央管理组织存在？
The results show that the mechanical property level of GAP based propellants is relatively low owing to the effects of side chain in GAP binder, thus, its molecular structure must be modified.
结果表明：由于GAP粘合剂中侧链的影响，使推进剂力学性能水平较低，因而必须对其进行改性。
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