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                    1.  VG200 真空計 
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                             VG200高性能數字式電子真空計，具有5位LCD數字顯示，測量單位有in/hg和mbar可供選擇。高性能傳感器可以承受400psi壓力。使用9Valkaline電池可以連續工作30小時，...
                        
                      
                    
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