I'd always tried to ask people...the spice pounder...the spice grinder,
etc.
Finally, I've found the words (while looking for a good Indian kambing soup recipe) for these tools. Mortar is the bowl, pestle is the pounder. Now I can start looking for them online, since local chinese markets don't seem to have them...at least not a complete set, I've always seen mortars on the shelves but no pestles.
中文： 臼研机 , 石臼