鸭清洗干净,置锅内,水盖过鸭。
用于接受所述的从外壳向里延伸的锁销以及所述端盖限定至少一个第一和一个第二位置。
For receiving said lock pin stretching inward from the casing and said end cover, at least one first and one second positions are limited.
因此,当需要提起上盖时,操作者站在真空锁周围任一位置时提起上盖都非常方便。
Therefore, when the upper cover needs to be lifted, operators can lift the upper cover very conveniently by standing at any position around the vacuum lock.
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