The mechanical exhaust valve operation system is replaced by（）in an electronic controlled ME engine. a system with a Hydraulic Power Supply (HPS) unit。 a system with roller guides for exhaust valves。 a system with an electronically controlled Alpha Lubricator。 a system directly powered by electric motor。
流程的节拍是指连续完成相同的两个产品之间的（）。
补画E-14视图中所缺的第三视图。
If a camshaft-less engine has a normal injection pressure at rated speed, the injection pressure will be at slow speed（） too low。 a little lower。 a little higher。 exactly the same。
何谓自检？何谓巡检？
（）is not a feature of the electronic controlled engines.
