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.
When two or more consonants appear together and you hear each sound that each consonant would normally make, the consonant team is called a consonant blend. For instance, the word blend has two consonant blends: bl, for which you hear the sounds for both b and l, and nd, for which you hear the sounds for both n and d.hen two or more consonants appear together and you hear each sound that each consonant would normally make, the consonant team is called a consonant blend. For instance, the word blend has two consonant blends: bl, for which you hear the sounds for both b and l, and nd, for which you hear the sounds for both n and d.