All bolted joints should be inspected periodically and retorqued as needed. 所有螺栓連接都應該定期檢查，并需要重新緊固。
The ddrag link attaches to the blocker door with a link attachment fittin and to the inner duct with a bolt. 阻力連桿用一個(gè)連接裝置連接到阻流門(mén)并用一個(gè)螺栓連接到內部管道上。
滬公網(wǎng)安備 31011502000490號
電信業(yè)務(wù)許可證編號：滬B2-20190700
