n.污穢；骯臟
Meter crust is designed into antispatter structure, with better sealing performance, so it can prevent dirtiness from immerging into the inner structure. 儀表外殼為防濺結(jié)構(gòu)，具有較好的密性，故能保護(hù)其內(nèi)部機(jī)構(gòu)免受污穢浸入。
