The common types of memory used in PLCs are ___________(ROM)（只读存储器） and Random Access Memory (RAM).
The common types of memory used in PLCs are ___________(ROM)（只读存储器） and Random Access Memory (RAM).
翻译下面句子：1.Briefly，PLC is widely used. More than 200 enterprises develop about 300 PLCs to be used in automobile，chemical，industry，metallurgy，pulp papermaking etc.
翻译下面句子：1.Briefly，PLC is widely used. More than 200 enterprises develop about 300 PLCs to be used in automobile，chemical，industry，metallurgy，pulp papermaking etc.
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