The most common shielding gases used for these main arc welding processes include argon (Ar), helium (He), carbon dioxide (CO2) and oxygen (O2). While Ar, He and CO2 may be used by themselves (i.e. 100%) for certain applications, in other cases the four gases are mixed together in different combinations to form shielding gas blends.
Cluster reduction in speech is when a consonant cluster, that is two or three consonants occurring in sequence in a word (like ândâ in friend), is reduced by a child into a single consonant through omission.
The structure of the remainder of the paper is as follows. In section 2 I reviewCorrespondence Theory focusing especially on how correspondence constraintstreat cluster reduction. In section 3 I show how Lamontagne and Riceâs account ofNavajo can and must be elaborated to express the desired result.