If no gaskets are used in the piping joints of a Freon system, the joints must be .A.finis
If no gaskets are used in the piping joints of a Freon system, the joints must be .
A.finished joints
B.welded joints
C.ground joints
D.soldered joints
If no gaskets are used in the piping joints of a Freon system, the joints must be .
A.finished joints
B.welded joints
C.ground joints
D.soldered joints
A、Ballistic products (bulletproof vests and armor).
B、sporting goods, tires, ropes, missile cases, and pressure vessels.
C、replacement for asbestos in automotive brake and clutch linings and gaskets
D、reinforcement for metal matrix composite
B、sporting goods, tires, ropes, missile cases, and pressure vessels.
C、replacement for asbestos in automotive brake and clutch linings and gaskets
D、reinforcement for metal matrix composite
What do proverbs tell us?
They tell us ______.
The passage mainly tells us about______.
A.the bus and train fares in the US
B.the ways of paying a taxi in the US
C.the public transportation in the US
D.the advantage of subways in the US
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