A.下排氣:3min,預(yù)真空:3min,正壓排氣法:3min B.下排氣:5min,預(yù)真空:3min,正壓排氣法:5min C.下排氣:5min,預(yù)真空:3min,正壓排氣法:4min D.下排氣:3min,預(yù)真空:2min,正壓排氣法:3min
A.5d~10d B.10d~14d C.12d~14d D.4d~8d
A.放于離地高25cm~30cm,離天花板50cm,離墻5cm B.放于離地高20cm~25cm,離天花板50cm,離墻5cm C.放于離地高20cm~25cm,離天花板30cm,離墻5cm D.放于離地高20cm~25cm,離天花板50cm,離墻15cm