单项选择题
A.priming water B.power supply C.packing gland D.bearing lubrication
Open the （）of inter cooler before starting an air compr...
单项选择题Open the （）of inter cooler before starting an air compressor.
A.cylinder cover B.cooling water C.oil cup D.drain valve
Open the （）before starting an air compressor.A.unload v...
单项选择题Open the （）before starting an air compressor.
A.unload valve B.cooling water C.oil cup D.sump
Supply the （）before starting an air compressor.A.fuel o...
单项选择题Supply the （）before starting an air compressor.
A.fuel oil B.cooling water C.steam D.power
