Using the putty knife, work the sealant into the joint to ensure that the sealant has fully covered the void.
用油灰刀把密封剂填入接合处，确保密封剂全部盖住空洞。
Thus, the utility model lightens worker's labor intensity, improves the working environment, and enhances the labor productivity and the quality of the putty knife.
从而减轻了工人的劳动强度、改善了工作环境，提高了劳动生产率和油灰刀的质量。
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