Now,we suggest that more advantageous composite flat tooth bits (for example, 8 PC、0 PC、 PC、 PC bits) be used to gradually replace the chisel bits that are widely used at present.

Now,we suggest that more advantageous composite flat tooth bits (for example, 8 PC、0 PC、 PC、 PC bits) be used to gradually replace the chisel bits that are widely used at present.

建议用更具优势的复合片齿钎头（例如 8 PC、0PC、PC、PC钎头），逐步更新目前广泛使用的一字钎头。