Pronunciation: [at wˌɪt͡ʃ plˈe͡ɪs] (IPA) 
The phrase "at which place" is spelled as /æt wɪtʃ pleɪs/. The sound /æt/ represents the word "at". The sound /wɪtʃ/ represents the word "which" which is pronounced with a voiceless palatal fricative (/ʃ/) at the end. Finally, the sound /pleɪs/ represents the word "place" which is pronounced with a long /eɪ/ sound. This phrase is used to refer to a specific location or point of reference in a sentence.
"At which place" is a phrase used to refer to a specific location or point in space where something is situated or has occurred. It is a more formal and precise way of asking or indicating the position or whereabouts of an object, event, or person.
The word "at" signifies being present or in proximity to a particular site, while "which" suggests that the place in question has already been mentioned or specified. When these terms are combined with "place," the resulting phrase seeks to inquire or establish the exact location or the site mentioned.
For instance, if someone asks, "At which place did you leave your keys?" they are specifically inquiring about the precise location or spot where the keys were left. In this context, the phrase "at which place" is used to emphasize the need for accurate information regarding the position of the keys.
In summary, "at which place" is a phrase used to inquire about the specific location or site of something. It is commonly used to seek detailed information about the whereabouts or positioning of objects or events, and it indicates a formal and precise manner of referring to a particular place or point in space.
