The phrase "attach both" is correct and usable in written English.
It can be used when instructing someone to include two items or documents together in a communication, such as an email.
Example: "Please attach both the report and the presentation to your email before sending it."
Alternatives: "include both" or "add both".
Customers can attach both local and cloud-based documents in an email message.
However, such intercalating molecules would inevitably and non-selectively attach both in between the layers and the outer surfaces of ZrP nanoplatelets.
For extreme bending, the hybrid films on the substrates were folded in half by pressing two pieces of Si wafer together using tape to attach both ends of the polyimide to the wafer (see left two photographs of Figure 3b).
When the 2010 defense authorization bill came up for a vote, representatives from GetEqual and the undocumented youth movement collaborated to attach both the DREAM Act and DADT repeal to the larger legislation.
Another strategy to realize mixed SAMs is to attach both functional groups of interest to the same molecule.
They may attach both positive and negative meanings to their experiences depending on the context and circumstances.
Elian has become attached both to his Miami relatives and his new homeland.
Investigators had focused originally on the rudder and the vertical portion of the tail to which it attaches, both of which fell off the plane.
The younger Mr Graham has described Islam as "a very evil and wicked religion" and Messrs Jakes and Osteen are too attached, both personally and theologically, to the "prosperity Gospel".
The PtBMA domains are densely attached both as the shells along PS sheets and as passages with a hexagonal pattern.
In particular, we attached both of them to the μ-metallic-contacts that are protected with a layer of thiol-gold.
