The two were discussing the commonly used rain screen principle in industrial workshops.
The two apprentices listened with wide eyes; they initially thought Inspector Cheng was merely asking casually, but it turned out that Inspector Cheng really understood these practical aspects?!
"Are you planning to do a drop water treatment for the culvert structure?"
"Drop water treatment?"
"The culvert itself has a drop; if rainwater rushes directly to the wall when it enters the main channel, it can easily build up and cause blockages. During light rain, it's manageable, but during continuous heavy rain, you'd have to send someone into the channel to clear out the mud."
