Definition of microtunnelling in English:

microtunnelling

noun ˌmʌɪkrə(ʊ)ˈtʌn(ə)lɪŋ

The formation or construction of extremely small-diameter tunnels, especially (in Engineering) the mechanical excavation of such tunnels, which are typically used for pipe-laying.

adjective ˌmʌɪkrə(ʊ)ˈtʌn(ə)lɪŋ

Of, relating to, or designating the formation or construction of very small-diameter tunnels or channels, especially (in Engineering) the mechanical excavation of such tunnels, e.g. for pipe-laying. Usually attributive.

Origin

1980s; earliest use found in Soviet Materials Science. From micro- + tunnelling
1980s; earliest use found in Japan Telecommunications Review. From microtunnelling; compare -ing.

Definition of microtunnelling in US English:

microtunnelling

nounˌmʌɪkrə(ʊ)ˈtʌn(ə)lɪŋ

The formation or construction of extremely small-diameter tunnels, especially (in Engineering) the mechanical excavation of such tunnels, which are typically used for pipe-laying.

adjectiveˌmʌɪkrə(ʊ)ˈtʌn(ə)lɪŋ

Of, relating to, or designating the formation or construction of very small-diameter tunnels or channels, especially (in Engineering) the mechanical excavation of such tunnels, e.g. for pipe-laying. Usually attributive.

Origin

1980s; earliest use found in Soviet Materials Science. From micro- + tunnelling<br>1980s; earliest use found in Japan Telecommunications Review. From microtunnelling; compare -ing.

词汇	microtunnelling
释义	Definition of microtunnelling in English: microtunnelling noun ˌmʌɪkrə(ʊ)ˈtʌn(ə)lɪŋ The formation or construction of extremely small-diameter tunnels, especially (in Engineering) the mechanical excavation of such tunnels, which are typically used for pipe-laying. adjective ˌmʌɪkrə(ʊ)ˈtʌn(ə)lɪŋ Of, relating to, or designating the formation or construction of very small-diameter tunnels or channels, especially (in Engineering) the mechanical excavation of such tunnels, e.g. for pipe-laying. Usually attributive. Origin 1980s; earliest use found in Soviet Materials Science. From micro- + tunnelling 1980s; earliest use found in Japan Telecommunications Review. From microtunnelling; compare -ing. Definition of microtunnelling in US English: microtunnelling nounˌmʌɪkrə(ʊ)ˈtʌn(ə)lɪŋ The formation or construction of extremely small-diameter tunnels, especially (in Engineering) the mechanical excavation of such tunnels, which are typically used for pipe-laying. adjectiveˌmʌɪkrə(ʊ)ˈtʌn(ə)lɪŋ Of, relating to, or designating the formation or construction of very small-diameter tunnels or channels, especially (in Engineering) the mechanical excavation of such tunnels, e.g. for pipe-laying. Usually attributive. Origin 1980s; earliest use found in Soviet Materials Science. From micro- + tunnelling<br>1980s; earliest use found in Japan Telecommunications Review. From microtunnelling; compare -ing.
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