型号
“A”尺寸
“B”尺寸
导杆直径
钻头尺寸
AT518TA
0.2500
0.2190
0.1910
#40
AT518TB
0.2810
0.2480
AT518TC
0.3120
#30
AT518TD
0.3590
0.2690
0.3125
AT518TE
0.1875
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