| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas measuring instrument equipped with a switch valve capable of switching a flow channel certainly by revolving operation. SOLUTION: The switch valve is constituted of the frame body 18 connected to the operation lever 17 of a slide valve 16 which constitutes the switch valve, the arm 20 which is loosely fitted in the frame body 18 at its one end and fixed to the shaft revolved by a knob operable from the outside at its other end and the tensile spring 21 which is stretched across a base stand and the arm 20 to energize the arm 20 to either one of the end sides of the operation lever 17. COPYRIGHT: (C)2006,JPO&NCIPI
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