Before starting test all needle valves must be closed.

在开始检测之前,所有阀门都必须关闭.

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Before starting test, all needle valves on test kit must be closed.

在开始检测前, 检测组件上的所有针形阀都必须关闭.

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Before starting test, all needle valves on the test kit must be closed.

在开始检测之前, 检测组件上的所有针形阀必须关闭.

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Before starting test, all needle valves and bleed valves on test kit must be closed.

在开始检测之前, 所有测试组件上的针形阀和排气阀都必须关闭.

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Three tentative designs of starting test system of the test bed were proposed andwere proved.

为满足总体对发动机地面试验入口压力的设计要求,提出了三种试车台起动试验系统设计方案.

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