Grade 304 stainless steel is recommended for inland areas and Grade 316 stainless steel or titanium is recommended for coastal areas or other highly corrosive environments.
于内陆地区，建议使用304级不袗材质；于海岸地区或其他腐蚀性强的区域，建议使用316级不袗或钛金属材质。
Most popular models are self-powered, heavy-duty instruments that are highly immune to electrical interference and corrosive environments.
最通用的是自供电，重型设备配套用仪表具有很高的抗电干扰和腐蚀性环境。
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