It has been a long time to write back to you, Mister, I'm really sorry.
这么长时间才给先生回信，真是抱歉。
Take a look at the spray tip and write back to me with the markings you find on the tip.
请参看一下喷嘴梢，并告诉我喷嘴梢上的记号。
Take a look at the spray tip and write back to me with the markings you find on the tip.
请参看一下喷嘴梢，并告诉我喷嘴梢上的记号。
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