超市冷冻冷藏
supermarket cold preservation
Supermarket clod
冷冻、冷藏
Cooling and refrigeration
水产冷冻冷藏
Aquatic freeze and refrigeration
被砾石与地层砂混合物充填的射孔孔道
gravelsand filled perforation tunnel
抽采孔孔距
distance of the gas drainage
大孔孔分布
macro-pore size dis-tribution