链式制榫机的链条须设有护罩，在切实可行范围内尽量将铣刀围封。
The chain of a chain mortising machine shall be provided with a guard that shall enclose the cutters so far as practicable .
链式制榫机的链条须设有护罩，在切实可行范围内尽量将铣刀围封。
The chain of a chain mortising machine shall be provided with a guard that shall enclose the cutters so far as practicable .
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