The switch is directly fixed on the trigger while the inside of the holding portion of the hand lever has a trigger rib which is relatively arranged to a contact point on the switch.

所述开关 直接固定在扳机上，同时所述手柄握持部位内设有同该开关上的触点相对的 触发筋。

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Insert a foil pack of powdered insulin into a slot, prime the pump with a lever and push a trigger that releases the cloud of insulin into a clear plastic chamber.

FORBES: Magazine Article