Corrosion resistant ss fluid passages, air Control Valve in Ergonomic handle, with new MAXIMUMDELIVERY air nozzles.
耐腐蚀不锈钢流体通道，空气控制阀在人体工程学手柄，最大的传送与新空气喷嘴在行业后面。
2
After the message is rolled back to the destination, the underlying system redelivers the message based on the destination's maximum failed delivery setting.
将消息回滚到目的地后，基础系统基于目的地的最大失败提交次数设置重新提交消息。
3
Subscribers can specify a maximum QoS for delivery of messages on a per-topic basis, so a message published at QoS 2 May not be delivered to its subscribers at that level.