本文应用板式混凝土早期收缩开裂试验架成型约束状态的混凝土大板，并在大板的中心位置、对角线位置和十字区域取芯制取试件。
Concrete plates under restrained condition were prepared using special plate molds and specimens drilled in the central position, diagonal position and crisscross position of the concrete plates.
试验结果表明，催化转化器的位置距排气口近可提高排气温度，大大提高催化转化器的转化效率；推迟点火提前角和提高怠速转速均有利于使催化转化器进入快速起燃状态。
Experimental results show that the position of the converter nearer to the exhaust port, the retard ignition timing and the higher idle speed can promote the catalytic converter light-off.
抽屉单元装有可靠的机械联锁装置，只有在分断开关的状态下才能被打开，同时抽屉具有明显的合闸、试验、分断位置显示。
There is mechanical interlock for the drawer units, they can be opened only if the switch is at break-off state. The drawers have apparent position indication for close~ test and off.
抽屉单元装有可靠的机械联锁装置，只有在分断开关的状态下才能被打开，同时抽屉具有明显的合闸、试验、分断位置显示。
There is mechanical interlock for the drawer units, they can be opened only if the switch is at break-off state. The drawers have apparent position indication for close~ test and off.
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