The throttler may be approximately divided into two types, one is mechanically con-trolled type and the other is vacuumcontrolled type.
节气门大致可分为两种类型，一类是机械控制式，另一类是真空控制式。
2
Sous vide, or cryovacking, where food is vacuum packed in plastic and then cooked in warm, temperature-controlled water to a desired doneness
真空调理食物，或真空包装食物，是将食品用塑料真空包装而后用温度受控的温水烹调以达到期望熟度。
3
In the system the digital is controlled by PLC, digital is mainly used to control the switch data of pipeline in the vacuum system and metallurgical vessel and CVD vessel.