nanahara0125
The river has an average depth of five meters, the depth of up to ten meters.
贪吃的双鱼宝宝
1.Taking out 3% from each batch and time of products,dip in water for 3 minutes without leakage(depth 1 meter,temperature 45 degrees centigrade) 2.Make aeration tests for all products.Blow 1.2 air pressure into the main body housing,without air leakage in one minute. 3.Taking out 2% from each batch and time of products,put into refrigerator (temperature minus 5 degrees centigrade) for 2 hours.Then expose in the room temperature.There should not be mist and moisture. 4.Fill the main body housing with nitrogen after vacuumizing.
优质英语培训问答知识库
