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Bolting with traditional cross ®¥♥÷deep foundation pit suppor'&∞ting supporting and stra↓✔≈nd, steel noose, compared with the ¶★ significant technical and  ​δ↔economic superiority. Full∏♥y mechanized operation, ♣≥↕without drilling, screwing direcφ↔tly, greatly improving the sp→ε♥≥eed of construction. T€€ €he bolting alternative to a horizontal≤• support, reducing t' π♦he construction obstacles<€←, greatly expanded work space •✘for subsequent mechanization engi∏↔ λneering construction convenience.