The invention provides a process for reactivating a metathesis catalyst which is composed of a catalyst (1) consisting of a compound containing at least one metal element selected from among tungsten,molybdenum, and rhenium and a catalyst (2) consisting of at least one member selected from between magnesium oxide and burned hydrotalcite and which is in a state deteriorated by long-term repetitionof reaction and regeneration treatment involving the removal of poisoning substances and coke by burning at high temperature to a level equivalent to that of fresh one or a required level easily, simply and efficiently and a process for the production of olefins by metathesis which comprises the step of the reactivation.
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The invention provides a bit block for the electroconvulsive therapy, which is capable of protecting teeth and preventing glossoptosis.
本发明提供了一种用于电惊厥疗法的位阻滞器，能够保护牙齿并防止光泽度降低。
The invention provides a method for protecting a mask.
本发明提供一种保护掩膜板的方法，所述掩膜板包括：衬底；
The invention provides a method of moving a display area.
本发明提供一种移动一显示区域的方法。
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