... workers working under the field operations conditions such as drilling crew, ZYD, logging, geophysical exploration, construction works, railway construction ... rain, snow and sandstorm. 2. Adopting EPS, PU, rock cotton etc., which are the heat insulation, sound insulation and fireproofing ... must not be less than 6 megohm Customized Drill Crew Camp - Meeting Room/Kitchen/Dining Room/Bedroom/Warehouse/ ...