文中的to which是指什麼

The camera module has been manufactured in a small size with a slim
structure according to targets to which the camera module is installed.


which的先行詞是targets
be installed to xxx : 被安裝到xxx <--- (which = xxx)

to which的這個介系詞to是從is installed to而來, 讓which擔任其受詞, 這個to可以放在句尾; 也可以移到關代前, 就成了to which.

亦即可寫為:
.....targets which the camera module is installed to.
也可寫為:
.....targets to which the camera module is installed.


翻譯

這個攝影模組根據其所要被安裝到的目標物件, 已被製成小型纖細的結構.

the camera module has been manufactured in a small size with a slim structure according to targets to which the camera module is installed .

to which the camera module is installed 試做為形容詞的關係子句，用來修飾targets (關係子句介詞前調，看這裡)


the camera module has been manufactured in a small size
照相機的零組件已經都製造成小尺寸

with a slim structure according to targets
依據目的用纖細的結構

to which the camera module is installed .
照相機所裝設的

合起來：照相機的零組件已經都依據照相機所裝設的目的用纖細的結構製造成
小尺寸

此相機模組根據將安裝到物件而製造成小型且結構精簡。
to which the camera module is installed整個形容詞子句修飾前面的targets
也可寫成which the camera module is installed to
就是 ""這個相機模組被安裝到的"" 修飾targets