which的用法分析求助

in which === where
I went to the park in which I walk my dog.
I went to the park where I walk my dog.

whose === [ of which....... {things only}]
The book whose cover is green is mine.
The book of which the cover is green is mine.

*** when === in/ on /at + which
I know the time when he will come.
I know the time on which he will come.

at which === where
The hotel at which we stayed was very comfortable.
The hotle where we stayed was very comfortable.

I still remember the day + [when /on which /that]
+ we met for the first time.
*** when ===on the day
*** which (N)===the day, on which ===on the day === that

本句：which 只是一个代词，并没有引导从句。

which 指代 sundials

which 引导的不是句子，就没有主语。只有句子才有主语。

本句主语是：The development of mechanical timepieces

不懂得不要乱说！！本句with which to regular them根本就不是句子！！

译为：机械计时器的发展刺激了人们对规范他们的日晷的更进一步的研究。
Which 指代sundial，不