The arrangement of the safety valve makes the barrel body form zero load when the tyre pressure reaches the set value.
设置安全阀可使得在轮胎压力达到设定值时，筒体形成空载。
Working Scope: 0-200psi Feature: Noble and elegant color shell together with ocean blue LED display enable you to set gauging unit by yourself and adjust tyre pressure in time.
工作范围：0- 200psi特点：时尚精致的彩色外壳，配合海蓝色的LED显示可让您自行设定测试单位及时调整轮胎压力。
Working Scope:0-200PSI Feature: Noble and elegant metal shell together with ocean blue LED display enable you to set gauging unit by yourself and adjust tyre pressure in time.
工作范围：0-200PSI特点：高贵典雅的金属外壳，配合海蓝色的LED显示可让您自行设定测试单位及时调整轮胎压力。
Working Scope:0-200PSI Feature: Noble and elegant metal shell together with ocean blue LED display enable you to set gauging unit by yourself and adjust tyre pressure in time.
工作范围：0-200PSI特点：高贵典雅的金属外壳，配合海蓝色的LED显示可让您自行设定测试单位及时调整轮胎压力。
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