Grandfather.

ông nội

paternal grandfather.

Gentleman.

mời ông ấy vào

Ask the gentleman to come in.

You mister; you sir.

canal

Giải thích VN: Rãnh ở mặt dưới của [[vành. ]]

Giải thích EN: The groove on the underside of a corona.

mister

adjutage

alveus

barrel

blowpipe

box spanner

bush

bushing

bypass

cartridge

cellular

channel

collar

communication pipe

conduit

course

duct

duet

flexible pipe

flexible tube

flexible tubing

hose

lamp

manifold

mantle

muff

nozzle

pin

pipe

pipe, conduit and duct

pipeline

quill

rigid pipe

sewer pipe

shell

shoot

sleeve

thimble

transverse drain

trunk

tube

tubing

tunnel

vessel

channel

duct

flask

rack

tube

vessel