A tool structure composed of two pivotally connected handles and a tool head. The change of the property of the block polymer in response to a stimulus is a change from the lyophilic nature to the lyophobic nature, or the lyophilic nature to the lyophobic nature. The smaller electrode shape and circumference is configured to control the quantity of plasma that is produced. The operation verification of the RTL-description circuit is performed to obtain the detection results of the overflow detector. The brittle compact is crushed for further finely shearing the grinding chips and the resultant grinding chips are mixed with a solidification assistant for producing an iron-based powder material containing the solidification assistant.