ADJ coming before; anticipating or preceding 在前的; 预料的
It is generally considered that the simple mechanical mixture of ferrite and cementite is gained in the pearlite transformation and there is prevenient phase in this process.
一般认为，珠光体转变得到铁素体和渗碳体的机械混合物，而且存在领先相。
The eutectoid decomposition is a self organization process, which is characterized by the integrated mechanism that ferrite and cementite acted as prevenient phase alternatively.
共析分解是个自组织过程，具有铁素体和渗碳体互为领先相的整合机制。
Set up and upgrading repair and prevenient maintenance plan. Lead repairman implement it.
建立并完善修理和维护性保养计划，并组织实施。
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