【单选题】Using a micrometer, measure the piston diameter at a right angle to the piston pin hole, and at the piston of 25.6 mm (1.008 in.) from the piston head. What does the underlined words mean?
【单选题】To determine the main bearing clearance of a propulsion diesel engine, you should measure the main bearing shell using a ball anvil outside micrometer and measure the crankshaft journal using a/an ()