59._________A.tight B.loose C.large D.small

The _____ compressor and its electrical motor are entirely housed in a gas-tight casing.A.

59._________A. forB. inC. withD. by

59._________A. rulesB. proceduresC. regulationsD.

59._________A.. creativityB. reliabilityC. intell

59._________A. specialistB. assistantC. supporter

59._________A.. monumentsB. graveyardsC. tabletsD